[LETTERHEAD OF THE NAVIGATORS GROUP, INC.]




VIA EDGAR

Securities and Exchange Commission
Division of Corporation Finance
100 F Street, NE
Washington, D.C.  20549
Attn:  Mr. Jim B. Rosenberg
       Senior Assistant Chief Accountant

                                           February 1, 2008



       Re:    The Navigators Group, Inc. (the "Company")
              Form 10-K for fiscal year ended December 31, 2006 (File
              No. 0-15886)

Dear Mr. Rosenberg:

     This letter is in response to the Division of Corporation Finance's comment
letter dated November 29, 2007, in which you requested additional information
based on your review of the Company's annual report on Form 10-K for the year
ended December 31, 2006 (the "2006 10-K"), and to the subsequent comments
provided to us by Mark Brunhofer of the Division of Corporation Finance in a
telephone discussion on January 28, 2008. The comments included in your letter,
and the additional comments provided to us by Mr. Brunhofer in our telephone
discussion, are repeated below, and our response immediately follows each
comment. Any information in the responses below that the Company has indicated
will be included in its Form 10-K for the fiscal year ended December 31, 2007
(the "2007 10-K") will be updated to reflect the year-end numbers when the 2007
10-K is filed.

     In connection with the filing of our responses to your comments, the
Company acknowledges that:

o    the Company is responsible for the adequacy and accuracy of the disclosure
     in the 2006 10-K;
o    staff comments or changes to disclosure in response to staff comments do
     not foreclose the Securities and Exchange Commission (the "Commission")
     from taking any action with respect to the 2006 10-K; and


                                        1




o    the Company may not assert staff comments as a defense in any proceeding
     initiated by the Commission or any person under the federal securities laws
     of the United States.

Form 10-K for fiscal year ended December 31, 2006
- -------------------------------------------------

Management's Discussion and Analysis ("MD&A") of Financial Condition and Results
- --------------------------------------------------------------------------------
of Operations Results of Operations and Overview
- ------------------------------------------------

Net Losses and Loss Adjustment Expenses Incurred, page 54
- ---------------------------------------------------------

1.   We believe your disclosure in MD&A regarding the estimation of the reserve
     for losses and loss adjustment expenses could be improved to better explain
     the judgments and uncertainties surrounding this estimate and the potential
     impact on your financial statements. We believe in order to meet the
     principal objectives of MD&A this disclosure should enable the investor to
     understand 1) management's method for establishing the estimate; 2) whether
     and if so to what extent and why you have adjusted your assumptions used to
     determine the estimate from the assumptions used in the immediately
     preceding period and 3) the potential variability in the most recent
     estimate and the impact this variability may have on reported results,
     financial condition and liquidity. Please keep these points in mind in
     providing us your responses to the comments listed below. Notwithstanding
     your responses to comments two and three of our letter dated December 8,
     2005, please revise your disclosure to provide the following information
     for each material line of business and also consider providing any
     additional information to achieve this objective.

     a.   Although you identify some of the actuarial methods you utilize, you
          do not appear to describe these methods nor explain in what
          circumstances you apply each method. Please describe the methods you
          used to determine your reserve for losses and loss adjustment
          expenses. Please ensure this description:

          1.   Explains how the methods you use for your short-tail business
               differ from the methods you use for your long-tail business.

          2.   Identifies the unique development characteristics of each
               material short-tail and long-tail line of business.

          3.   Describes the method you use to calculate the IBNR reserve for
               each material line of business. For example, we understand that
               some companies may calculate this reserve by estimating the
               ultimate unpaid liability first and then reducing that amount by
               cumulative paid claims and by case reserves, but there may be
               other methods as well.

          4.   Describes the extent of your procedures for determining the
               reserve for loss and loss adjustment expense on both an annual
               and interim reporting basis.


                                        2




          Response:
          --------

          The 2007 10-K will reflect the following paragraphs in the MD&A in the
     section Operating Expenses--Net losses and Loss Adjustment Expenses
     Incurred:

          The Company's actuaries generally calculate the IBNR loss reserves for
     each line of business by underwriting year for major products principally
     using two standard actuarial methodologies which are projection or
     extrapolation techniques: the loss ratio method and the
     Bornheutter-Ferguson method. The loss ratio method is used to calculate the
     IBNR for the most current underwriting year while the Bornheutter-Ferguson
     method is used to calculate the IBNR for all prior underwriting years,
     except as otherwise described below. Such methodologies are supplemented in
     most instances by the loss development method and the frequency/severity
     method which are used to analyze and better comprehend loss development
     patterns and trends in the data when making selections and judgments under
     the loss ratio method and the Bornheutter-Ferguson method. In utilizing
     these methodologies, each of which is generally applicable to both
     long-tail and short-tail lines of business and all of which are described
     below, to develop our IBNR loss reserves, a key objective of our actuaries
     is to identify aberrations and systemic changes occurring within historical
     experience and accurately adjust for them so that the future can be
     projected more reliably. This process requires the substantial use of
     informed judgment and is inherently uncertain.

          There are instances in which facts and circumstances require a
     deviation from the general process described above. Two such instances
     relate to the IBNR loss reserve processes for our 2005 Hurricanes Katrina
     and Rita losses and our asbestos exposures, where extrapolation techniques
     are not applied, except in a limited way, given the unique nature of
     hurricane losses and limited population of marine excess policies with
     potential asbestos exposures. In such circumstances, inventories of the
     policy limits exposed to losses coupled with reported losses are analyzed
     and evaluated principally by claims personnel and underwriters to establish
     IBNR loss reserves. At September 30, 2007, the gross and net loss reserve
     amounts of our 2005 Hurricanes Katrina and Rita losses were $188.3 million
     and $5.3 million, respectively, and the gross and net loss reserve amounts
     for our asbestos exposures were $23.9 million and $17.4 million,
     respectively.

          A brief summary of each actuarial method discussed above follows:

          Loss ratio method: This method is based on the assumption that
     ultimate losses vary proportionately with premiums. Pursuant to the loss
     ratio method, IBNR loss reserves are calculated by multiplying the earned
     premium by an expected ultimate loss ratio to estimate the ultimate losses
     for each underwriting year, then subtracting the reported losses,
     consisting of paid losses and case loss reserves, to determine the IBNR
     loss reserve amount. The ultimate loss ratios applied are the Company's
     best estimates for each underwriting year and are generally determined
     after evaluating a number of factors which include: information derived by
     underwriters and actuaries in the initial pricing of the business, the
     ultimate loss ratios established in the prior accounting period and the
     related judgments applied, the ultimate loss ratios of previous
     underwriting years, premium rate changes, underwriting and coverage
     changes, changes in terms and


                                        3




     conditions, legislative changes, exposure trends, loss development trends,
     claim frequency and severity trends, paid claims activity, remaining open
     case reserves and industry data where deemed appropriate. Such factors are
     also evaluated when selecting ultimate loss ratios and/or loss development
     factors in the methods described below.

          Bornheutter-Ferguson method: The Bornheutter-Ferguson method
     calculates the IBNR loss reserves as the product of the earned premium, an
     expected ultimate loss ratio, and a loss development factor that represents
     the expected percentage of the ultimate losses that have been incurred but
     not yet reported. The loss development factor equals one hundred percent
     less the expected percentage of losses that have thus far been reported,
     which is generally calculated as an average of the percentage of losses
     reported for comparable reporting periods of prior underwriting years. The
     expected ultimate loss ratio is generally determined in the same manner as
     in the loss ratio method.

          Loss development method: The loss development method, also known as
     the chainladder or the link-ratio method, develops the IBNR loss reserves
     by multiplying the paid or reported losses by a loss development factor to
     estimate the ultimate losses, then subtracting the reported losses,
     consisting of paid losses and case loss reserves, to determine the IBNR
     loss reserves. The loss development factor is the reciprocal of the
     expected percentage of losses that have thus far been reported, which is
     generally calculated as an average of the percentage of losses reported for
     comparable reporting periods of prior underwriting years.

          Frequency/severity method: The frequency/severity method calculates
     the IBNR loss reserves by separately projecting claim count and average
     cost per claim data on either a paid or incurred basis. It estimates the
     expected ultimate losses as the product of the ultimate number of claims
     that are expected to be reported and the expected average amount of these
     claims.

          An annual loss reserve study is conducted by the Company's actuaries
     for each major line of business employing the methodologies as described
     above with the timing of such studies varying throughout the year.
     Additionally, a review of the emergence of actual losses relative to
     expectations for each line of business, generally derived from the annual
     reserve study, is conducted each quarter to determine whether the
     assumptions used in the reserving process continue to form a reasonable
     basis for the projection of liabilities for each product line. Such reviews
     may result in maintaining or revising assumptions regarding future loss
     development based on various quantitative and qualitative considerations.
     If actual loss activity differs from expectations, an upward or downward
     adjustment to loss reserves may occur. As time passes, estimated loss
     reserves for an underwriting year will be based more on historical loss
     activity and loss development patterns rather than on assumptions based on
     underwriters' input, pricing assumptions or industry experience.

          The following discusses the method used for calculating the IBNR for
     each line of business and key assumptions used in applying the actuarial
     methods described.


                                        4




          Marine: Generally, two key assumptions are used by our actuaries in
     setting IBNR loss reserves for major products in this line of business. The
     first assumption is that our historical experience regarding paid and
     reported losses for each product where we have sufficient history can be
     relied on to predict future loss activity. The second assumption is that
     our underwriters' assessments as to potential loss exposures are reliable
     indicators of the level of our expected loss activity. The specific loss
     reserves for marine are then analyzed separately by product based on such
     assumptions, except where noted below, with the major products including
     marine liability, offshore energy, cargo, protection and indemnity ("P&I"),
     transport and bluewater hull.

          The claims emergence patterns for various marine product lines vary
     substantially. Our largest marine product line is marine liability, which
     has one of the longer loss development patterns. Marine liability protects
     an insured's business from liability to third parties stemming from their
     marine-related operations, such as terminal operations, stevedoring and
     marina operations. Since marine liability claims generally involve a
     dispute as to the extent and amount of legal liability that our insured has
     to a third party, these claims tend to take a longer time to develop and
     settle. Other longer-tail marine product lines include P&I insurance, which
     provides coverage for third party liability as well as injury to crew for
     vessel operators, and transport insurance, which provides both property and
     third party liability on a primary basis to businesses such as port
     authorities, marine terminal operators and others engaged in the
     infrastructure of international transportation. Offshore energy provides
     physical damage coverage to offshore oil platforms along with offshore
     operations related to oil exploration and production. The significant
     offshore energy claims are generally caused by fire or storms, and thus
     tend to be large, infrequent, quickly reported, but occasionally not
     quickly settled because the damage is often extensive but not always
     immediately known. Other marine product lines have considerably shorter
     periods in which losses develop and settle. Ocean cargo insurance, for
     example, provides physical damage coverage to goods in the course of
     transit by water, air or land. By their nature, cargo claims tend to be
     reported quickly as losses typically result from an obvious peril such as
     fire, theft or weather. Similarly, bluewater hull insurance provides
     coverage against physical damage to ocean-going vessels. Such claims for
     physical damage generally are discovered, reported and settled quickly. The
     Company currently has extensive experience for all of these products and
     thus the IBNR loss reserves for all of the marine products are determined
     using the key assumptions and actuarial methodologies described above.
     Prior to 2007, however, as discussed below, the Company did not have
     sufficient experience in the transport product line and instead used its
     hull and liability products loss development experience as a key assumption
     in setting the IBNR loss reserves for its transport product.

          Specialty: The reserves for specialty are established separately by
     product with the major product being contractors liability insurance. Other
     products include commercial middle markets, personal umbrella, primary
     casualty and excess casualty. Our actuaries generally utilize two key
     assumptions in this line of business: first, that our historical loss
     development patterns are reasonable predictors of future loss patterns and
     second, that our claims personnel's assessment of our claims exposures and
     our underwriters' assessment of our expected losses are reliable indicators
     of our loss


                                        5




     exposure. However, this line of business includes a number of newer
     products where there is insufficient Company historical experience to
     project loss reserves and/or loss development is sparse or erratic, which
     makes extrapolation techniques for those products extremely difficult to
     apply, and in those circumstances we typically rely more on industry data
     and our underwriters' input in setting assumptions for our IBNR loss
     reserves as opposed to historical loss development patterns. In addition,
     as discussed in more detail below with respect to construction defect
     reserves, our actuaries may take other market trends or events into account
     in setting IBNR loss reserves.

          The substantial majority of the specialty loss reserves are for the
     contractors liability business, which insures mostly general and artisan
     contractors. Contractor liability claims are categorized into two claim
     types: construction defect and other general liability. Other general
     liability claims typically derive from workplace accidents or from
     negligence alleged by third parties, and take a long time to report and
     settle. Construction defect claims involve the discovery of damage to
     buildings that was caused by latent construction defects. These claims take
     a very long time to report and to settle compared to other general
     liability claims. Since construction defect claims report much later than
     other contractor liability claims, they are analyzed separately in the
     annual loss reserve study.

          The Company has extensive history in the contractors liability
     business upon which to perform actuarial analyses and does use the key
     assumption noted above relating to its own historical experience as a
     reliable indicator of the future for this product. However, there is
     inherent uncertainty in the loss reserve estimation process for this line
     of business given both the long-tail nature of the liability claims and the
     continuing underwriting and coverage changes, claims handling and reserve
     changes, and legislative changes that have occurred over a several year
     period. Such factors are judgmentally taken into account in this line of
     business in specific periods. The underwriting and coverage changes include
     the migration to a non-admitted business from admitted business in 2003,
     which allowed the Company to exclude certain exposures previously permitted
     (for example, exposure to construction work performed prior to the policy
     inception), withdrawals from certain contractor classes previously
     underwritten and expansion into new states beginning in 2005. Claims
     changes include bringing the claim handling in-house in 1999 and changes in
     case reserving practices in 2003 and 2006. A California legislative change,
     the effects of which are yet to be fully understood by the industry, with
     respect to reserves and claim frequency for construction defect repairs,
     became effective July 1, 2002 with a sunset provision effective January 1,
     2011. The law provides for an alternative dispute resolution system that
     attempts to involve all parties to a claim at an early stage. The
     legislation may be impacting claim severity, frequency and the length of
     settlement which may ultimately be different than historical loss
     development assumptions employed in our loss reserve process.

          Most recently, in setting the IBNR loss reserves for construction
     defect claims, the Company's actuaries have begun to consider a new
     qualitative factor based on their evolving concern with the recent decline
     in home values caused by the sub-prime home mortgage crisis and its
     possible impact on the frequency and severity of construction defect
     claims. As a result, the Company's actuaries acknowledge this uncertainty
     and


                                        6




     anticipate claims arising from alleged construction defects contributing to
     housing value declines on policies written on newly constructed homes in
     our portfolio. We believe our reserves remain adequate to address such
     potential exposure, but we can give no assurances with respect thereto.

          The commercial middle markets business consists of general liability,
     auto liability and property exposures for a variety of commercial middle
     market businesses, principally hospitality, manufacturing and garages.
     Commencing in 2007, our actuaries are segmenting and analyzing the
     components of the loss development for this business among the property,
     liability and auto exposures which had been previously combined.

          Personal umbrella coverage is purchased by individuals who seek higher
     limits of liability than are provided in their homeowners or personal
     automobile policies. Losses tend to be large and infrequent, and often
     result from automobile accidents. They are reserved primarily using the
     Company's historical loss experience.

          Primary casualty insurance provides primary general liability coverage
     principally to corporations in the construction and manufacturing sector.
     Excess casualty insurance is purchased by corporations which seek higher
     limits of liability than are provided in their primary casualty policies.
     Neither product line has a significant amount of loss activity reported to
     date. Because the Company has limited historical experience in these
     products, the IBNR loss reserves for both of these products currently are
     established using the loss ratio method primarily based on our
     underwriters' input and industry loss experience.

          Professional liability: The professional liability policies mainly
     provide coverage on a claims-made basis mostly for a one-year period. The
     reserves for professional liability are analyzed separately by product with
     the major products being directors and officers ("D&O") liability coverage
     and errors and omissions ("E&O") liability coverage for lawyers and other
     professionals.

          The losses for D&O business are generally very large and infrequent,
     and typically involve securities class actions. D&O claims report
     reasonably quickly, but may take several years to settle. While the Company
     has been writing D&O business since 2001, the limited claim history is
     generally insufficient to establish IBNR loss reserves using Company data.
     As a result, the Company principally employs assumptions based on industry
     experience coupled with input from its underwriters and its claims staff's
     assessment of potential exposure to establish IBNR loss reserves. Another
     key assumption with respect to establishing IBNR loss reserves for D&O
     business is that such industry experience is representative of our future
     potential loss development with respect to trends in class action activity,
     such as the impact of stock option backdating, IPO laddering and, most
     recently, the sub-prime mortgage crisis. As time passes, for a given
     underwriting year, additional weight is given to assumptions relating to
     our actual experience and claims outstanding.

          The E&O IBNR loss reserve process is similar to the process for D&O,
     with the exception of a particular book of business of the U.K. Branch
     written from 2004 through


                                        7




     2006. For the U.K Branch E&O business, we assume the claims, while similar
     in nature to the claims in the U.S. E&O business, are larger, more frequent
     and have a longer loss development pattern. The IBNR loss reserves for the
     U.K. Branch E&O business are determined judgmentally after reviewing recent
     loss activity relative to the remaining in-force policy count and the loss
     activity for similar insureds.

          Other: Loss reserves for other include inland marine business and
     European property business written by the U.K. Branch. Both businesses were
     started in 2006. The Company has limited loss history and relies primarily
     on assumptions based on underwriters' input and industry experience. Also
     included are loss reserves for aviation, property and assumed reinsurance
     business in runoff since 1999, which are periodically monitored and
     evaluated by claims and actuarial personnel.

          Lloyd's Operations: Reserves for the Company's Lloyd's Operations are
     reviewed separately for the marine and professional liability lines by
     product. The major marine products are marine liability, offshore energy,
     cargo, specie and marine reinsurance, and the major products for
     professional liability are international D&O and international E&O.

          The marine liability, offshore energy and cargo products and related
     loss exposures are similar in nature to that described for marine business
     above. Specie insurance provides property coverage for chattel, such as
     jewelry, fine art and cash in transit. Claims tend to be from theft or
     damage, and thus are small, quick to report and quick to settle. Marine
     reinsurance is a diversified global book of reinsurance, the majority of
     which consists of excess of loss reinsurance policies for which claims
     activity tends to be large and infrequent with loss development somewhat
     longer than for such products written on a direct basis. Marine reinsurance
     reinsures liability, cargo, hull and offshore energy exposures that are
     similar in nature to the marine business described above.

          The process for establishing the IBNR loss reserves for the marine and
     professional liability lines of the Lloyd's Operations, and the assumptions
     used as part of this process, are similar in nature to the process employed
     by the Insurance Companies. Other business for the Lloyd's Operations
     includes European property and inland marine products, each of which is a
     new line of business where we have limited loss history and rely primarily
     on assumptions based on our underwriters' input and industry loss
     experience.

          The Lloyd's Operations products also include property coverages for
     engineering and construction projects and onshore energy business, which
     are substantially reinsured. Losses from engineering and construction
     projects tend to result from loss of use due to construction delays while
     losses from onshore energy business are usually caused by fires or
     explosions. Large losses tend to be catastrophic in nature and are heavily
     reinsured. IBNR loss reserves for attritional losses are established based
     on the Syndicate's extensive loss experience.


                                        8




     b.   Describe your policy, if any, for adjusting the reserve for losses and
          loss adjustment expenses to an amount that is different than the
          amount determined by your actuaries.

          1.   If such a policy exists, describe the method you used to
               determine the adjustment and the extent to which it relies on
               objective versus subjective determinations. Such adjustments may
               include, but not be limited to, an incremental provision, a
               reduction in the liability, or a reversal of a previously
               recorded adjustment.

          2.   When such adjustments or reversals are made, include MD&A
               disclosure that identifies the amount of the adjustment or
               reversal, the method you used to determine it, and the specific
               underlying reasons that explain why you believe the adjustment or
               reversal is necessary.

          Response:
          --------

          The Company's practice is to record the amount determined by its
     internal actuaries as its reserve for losses and loss adjustment expenses
     in its financial statements. Management of the Company does not make
     adjustments or reversals of the nature described above in its financial
     statements. In the event the Company's practice changes and it makes such
     an adjustment or reversal, it will include the information requested in
     1.b. above in its MD&A.

     c.   It appears that your revision of prior year reserves has significantly
          increased in 2007 as compared to the rate of revision in 2006 and 2005
          as demonstrated in your SOP 94-5 table on page 10. The 2007 adjustment
          of prior year reserves also appears to be significant to your 2007 net
          income. Your disclosure of the lines of business contributing to the
          2007 adjustment does not appear to provide meaningful information to
          investors. Please revise your disclosure to explain the reasons for
          your change in estimate for your specialty and marine businesses as
          well as your Lloyd's Operations:

          1.   Identify and describe in reasonable specificity the nature and
               extent of a) new events that occurred or b) additional
               experience/information obtained since the last reporting date
               that led to the change in estimates.

          2.   Ensure your disclosure clarifies the timing of the change in
               estimate such as why recognition occurred in the periods that it
               did and why recognition in earlier periods was not required.

          3.   (Additional comment provided on January 28, 2008) We acknowledge
               your response to our previous comment in 1.c. Please elaborate on
               your favorable underwriting experience, the legislative changes
               and the re-evaluation of your claim reserving practices
               identified in the fourth paragraph (below) of your proposed
               revised disclosure related to your contractors liability
               reserves. Please quantify the impact of each of these


                                        9




               factors where possible and fully describe how these factors
               impacted your prior period reserve estimates.

          4.   (Additional comment provided on January 28, 2008) In addition,
               please elaborate on the favorable development identified in your
               professional liability business in the sixth paragraph (below) of
               your proposed disclosure in response to comment 1.c. In this
               regard, please discuss whether the favorable development is a
               result of lower frequency, severity or a combination of both.

          Response:
          --------

          The 2007 10-K will reflect the following paragraphs in the MD&A in the
     section Operating Expenses--Net losses and Loss Adjustment Expenses
     Incurred:

          As part of our regular review of prior reserves, the Company's
     actuaries may determine, based on their judgment, that certain assumptions
     made in the reserving process in prior years may need to be revised to
     reflect various factors, likely including the availability of additional
     information. Based on their reserve analyses, our actuaries may make
     corresponding reserve adjustments. As discussed in more detail below, in
     2007, prior year reserve redundancies of $29.6 million were recorded.

          The relevant factors that can have a significant impact on the
     establishment and adjustment of loss and loss adjustment expense reserves
     can vary by line of business and from period to period. Following is a
     discussion of relevant factors impacting our 2007 loss reserves:

          The Insurance Companies recorded $2.9 million of net prior years'
     savings for marine business of which $6.0 million of savings was mostly due
     to transport business written during 2002 to 2006, offset by $1.5 million
     of 2005 Hurricanes Katrina and Rita loss development and $1.6 million for
     uncollectible reinsurance recoverables for asbestos losses. Prior to 2007,
     because the Company did not have sufficient experience in the transport
     product line, it instead used its hull and liability products loss
     development experience as a key assumption in setting the IBNR loss
     reserves for its transport product. Commencing in 2007, our actuaries
     determined that the Company's loss development experience for its transport
     product had become sufficiently credible to begin establishing transport
     reserves using such experience, which resulted in the prior year savings
     referred to above recorded for this business.

          The Insurance Companies recorded $11.5 million of net prior years'
     savings for specialty business of which approximately $10.0 million was for
     contractors liability business for the years 1998 through 2006 and
     approximately $1.5 million was for commercial middle markets business
     written in 2003 and 2004. The $10.0 million of the prior years' savings
     recorded for contractors liability business was due mostly to continued
     favorable loss frequency and severity trends for 2003 to 2006 compared to
     expectations. Our actuaries believe that the favorable loss frequency
     trends result primarily from a number of underwriting and coverage changes
     since 2002, including the


                                       10




     migration to non-admitted business from admitted business in 2003, which
     allowed the Company to exclude certain previously permitted exposures (for
     example, exposure to construction work performed prior to the policy
     inception), and withdrawals from certain contractor classes previously
     underwritten. Our actuaries believe that the favorable loss severity trends
     result primarily from improved claim practices coupled with a California
     legislative change, effective in mid-2002, which provides for an
     alternative dispute resolution system with respect to construction defect
     claims and is intended to avoid or mitigate costly litigation and claims
     settlements. While our actuaries were unable to precisely quantify the
     impact of each of the foregoing factors, such factors were judgmentally
     taken into account in recording such prior years' savings for contractors
     liability business by evaluating actual loss development compared to
     expected loss development coupled with a frequency and severity claims
     analysis conducted in 2007.

          The $1.5 million in prior years' savings for the commercial middle
     markets business resulted from segmenting and analyzing the components of
     the loss development for this business among property, liability and auto
     exposures, which had been previously analyzed as a combined single product
     line. Development factors were reduced given the shorter tail nature of the
     property and auto components, which were a larger percentage of the mix of
     the business in this line than previously assumed when the components were
     analyzed on a combined basis.

          The Insurance Companies have historically reserved for the
     professional liability business using ultimate loss ratios based on
     industry experience for this line of business given the Company's limited
     claims history. Such industry experience is heavily influenced by the
     historical frequency and severity of large securities class action
     lawsuits. During 2007 the Insurance Companies reduced the net reserves for
     such claims-made policies compared to year-end 2006 by $7.2 million, mostly
     related to policies issued in 2005. The reductions were made to recognize
     both the low level of open claim counts and the lack of claim severity
     compared to expectations at the time the reserves were initially
     established using industry experience.

          In 2007, the Insurance Companies recorded approximately $600,000 of
     net prior year savings from run-off business, principally resulting from a
     review of open claims files in the aviation business that was discontinued
     in 1999.

          The Lloyd's Operations recorded $7.4 million of net prior year
     savings, which included $2.7 million due to a review of the 2005 Hurricanes
     Katrina and Rita loss estimates, approximately $2.0 million due to a review
     of open claim files for the years 1998 to 2001, with the remaining $2.7
     million of favorable development spread across several lines of business,
     principally for offshore energy and liability business.

          To the extent that reserves are deficient or redundant, the amount of
     such deficiency or redundancy is recorded as a charge or credit to earnings
     in the period in which the deficiency or redundancy is identified.


                                       11




     d.   Please identify and describe those key assumptions that materially
          affect the estimate of the reserve for loss and loss adjustment
          expenses. In addition please disclose the following:

          1.   For each of your key assumptions quantify and explain what caused
               them to change from the assumptions used in the immediately
               preceding period. Please note that this discussion should
               supplement, rather than duplicate the disclosure provided
               responsive to Industry Guide 6.

          2.   Explicitly identify and discuss key assumptions as of December
               31, 2007 that are premised on future emergence that are
               inconsistent with historical loss reserve development patterns
               and explain why these assumptions are now appropriate given the
               inconsistency identified.

          Response:
          --------

          In response to 1(d)(1), please see above our responses to 1(a) for the
     identification of the key assumptions that materially affect the estimate
     of the reserve for the loss and loss adjustment expenses and 1(c) for the
     quantification of the impact of the changes of key assumptions. In response
     to 1(d)(2), please see our discussion above in 1(a) pertaining to the
     sub-prime home mortgage crisis.

     e.   In order to show investors the potential variability in the most
          recent estimate of your loss reserve, quantify and present preferably
          in a tabular format the impact that reasonably likely changes in the
          key assumptions identified may have on reported results, financial
          position and liquidity. Explain why you believe the scenarios
          quantified are reasonably likely. In this regard, your disclosure of
          examples of sensitivity in specific instances does not appear to
          indicate whether theses hypothetical changes are reasonably likely to
          occur and whether there are other key assumptions that are reasonably
          likely to change that would also affect your reserve balances and
          results of operations.

          Response:
          --------

          The 2007 10-K will include the following paragraphs in the MD&A in the
     section Operating Expenses--Net Losses and Loss Adjustment Expenses
     Incurred:

          The Company's actuaries use various assumptions in determining a best
     estimate of reserves for each line of business. The importance of any
     specific assumption can vary by both individual product within a line of
     business and underwriting year. If actual experience differs from key
     assumptions used in establishing reserves, there is potential for
     significant variation in the development of loss reserves, particularly for
     long-tail casualty classes of business.

          As discussed above, our actuaries generally apply the loss ratio
     method to calculate the IBNR loss reserve for the most current underwriting
     year while the Bornhuetter-Ferguson method is used to calculate the IBNR
     loss reserves for all prior underwriting years except in certain situations
     such as when limited or insufficient historical data is available.


                                       12




          Set forth below is a sensitivity analysis that estimates the effect on
     the Company's net loss reserve position of using alternative expected loss
     ratios for the underwriting years 2000 to 2007 and alternative loss
     development factors for the underwriting years 2000 to 2006 rather than
     those actually used in determining the Company's best estimates at
     September 30, 2007. The analysis addresses each major line of business and
     underwriting year for which a material deviation to the Company's overall
     reserve position is believed reasonably possible, and uses what the Company
     believes is a reasonably likely range of potential deviation for each line
     of business. The underwriting years prior to 2000 were not included given
     the maturity of such years and their relatively small contribution to the
     overall IBNR loss reserve amount at September 30, 2007. Such underwriting
     years are therefore deemed to be less likely to cause a material deviation
     to the Company's overall loss reserve position. There can be no assurance,
     however, that actual reserve development will be materially consistent with
     either the original or the adjusted expected loss ratios or loss
     development factor assumptions, or with other assumptions made in the
     reserving process, or that a material deviation in loss reserves will not
     occur for underwriting years prior to 2000.

          For the selected alternative expected loss ratios, our actuaries
     observed the range of ultimate loss ratios recorded for the underwriting
     years 2000 to 2006 for each major line of business at September 30, 2007.
     After evaluating the range of ultimate loss ratio variances for each
     underwriting year, our actuaries judgmentally selected a range of
     reasonably likely variations from the ultimate loss ratios recorded for
     each line of business for each underwriting year out of the range of
     reasonably possible variations for each underwriting year.

          The reasonably likely ranges of potential deviation in the loss ratios
     for each line of business for the 2000 to 2007 underwriting years expressed
     in loss ratio points are as follows:

     Reasonably Likely Loss Ratio Point Variances:

                                        Decrease    Increase
                                        --------    --------

     Marine                                    6           1
     Specialty                                 8           4
     Professional Liability                   18          12
     Lloyd's Operations                        9           5

          For the selected alternative loss development factors for the 2000 to
     2006 underwriting years, our actuaries observed the range of historical
     loss development factors recorded for such underwriting years for each
     major line of business at September 30, 2007. After evaluating the range of
     loss development factor variances for each underwriting year, our actuaries
     judgmentally selected a range of reasonably likely variations to determine
     alternative IBNR loss reserve amounts compared to the amounts recorded for
     each line of business for the underwriting years 2000 to 2006 out of the
     range of reasonably possible variations for such underwriting years. Such
     variations represent the differences in the time that it takes for losses
     to develop for an underwriting year.

          The reasonably likely ranges of potential deviations in the aggregate
     or overall loss development factors for all underwriting years for each
     line of business are as follows:


                                       13




     Reasonably Likely Ultimate Loss Development Factor Variances:

                                        Decrease    Increase
                                        --------    --------

     Marine                                  12%         12%
     Specialty                                9%          9%
     Professional Liability                   6%          8%
     Lloyd's Operations                      13%         15%

          Such sensitivity analysis was performed in the aggregate for all
     products in each line of business. The use of aggregate data was considered
     more stable and reliable compared to a product-by-product analysis. We
     cannot assure you, however, that such use of aggregate data will provide a
     more accurate range of the actual variations in loss development. The
     sensitivity analysis uses loss ratios and loss development patterns for the
     2000 to 2007 underwriting years, which are believed to be more
     representative compared to years prior to 2000 given the Company's evolving
     mix of business, product changes and other factors. There can be no
     assurances, however, that the use of such recent history is more predictive
     of actual development as compared to employing longer periods of history.
     In addition, while the net loss reserves include the net loss reserves for
     asbestos exposures, such amounts were excluded from the sensitivity
     analysis given the nature of how such reserves are established by the
     Company. While we believe such net reserves are adequate, we cannot assure
     you that material loss development may not arise in the future from
     asbestos losses given the complex nature of such exposures.

          A significant factor influencing the results of the sensitivity
     analysis has been the generally favorable loss trends experienced in the
     most recent three calendar years as evidenced by the recording of net prior
     year savings across each line of business. Future loss activity may in fact
     deviate substantially from recent experience by becoming less favorable or,
     in fact, unfavorable. In such event, future loss activity could lead to
     smaller than reasonably likely loss reserve savings or larger than
     reasonably likely loss reserve deficiencies as identified below.

          The sensitivity analysis also reflects a likely range of impact on
     reported financial results by aggregating calculated redundancy amounts and
     deficiency amounts for each line of business. The total Company range
     amounts below were determined by adding the reasonably likely range amounts
     for each line of business, which are uncorrelated to each other, and
     therefore such amounts may not be representative of the actual aggregate
     favorable or unfavorable loss development amounts that may occur over time.



                                                              Sensitivity Analysis
                                                               September 30, 2007
                                                       ($ in thousands, except per share)

                                                    Reasonably Likely Range of Deviation
                                                    ------------------------------------
                                          Total        Redundancy           Deficiency
                                        Net Loss       ----------           ----------
                                        Reserves     Amount      %      Amount        %
                                        --------     ------     --      ------       ---
                                                                  


                                       14




Insurance Companies:
  Marine                                  $191,105    $11,946     6%      $7,557     4%
  Specialty                                320,103     27,018     8%      18,189     6%
  Professional Liability                    68,119      6,500    10%       6,171     9%
  Other                                     25,017
                                       ------------ ---------- ------ ----------- -----------

      Total Insurance Companies            604,344     45,464     6%      31,917     4%

Lloyd's Operations:
  Marine and Other                         203,653     19,801    10%      13,916     7%
                                       ------------ ---------- ------ ----------- -----------

      Total Company                       $807,997    $65,265     8%     $45,833     6%
                                       ============ ========== ====== =========== ===========

Increase (decrease) to net income:
  Amount                                              $42,422          ($29,791)
                                                    ==========        ===========
  Per share (1)                                         $2.50            ($1.76)
                                                    ==========        ===========


(1)     Used 16,967,000 average diluted shares outstanding for the nine months
        ended September 30, (2007)(.)


2.   On page 59 you disclose the use of outside actuaries who perform annual
     loss reserve studies you use to judge the reasonableness of your recorded
     loss reserves. Your reference to these outside actuaries suggests that you
     are placing reliance on them, which the staff believes requires that the
     firm's name be included in the '34 Act filing. Additionally, if the Form
     10-K is incorporated by reference into a '33 Act registration statement, a
     consent from the actuaries must be provided in the '33 Act registration
     statement. Please advise.

          Response:
          --------

          We will omit the reference to the use of outside actuaries in future
     Form 10-K filings.

Notes to Consolidated Financial Statements
- ------------------------------------------

Note 3. Segment Information, page F-17
- --------------------------------------

3.   Please revise your disclosure to provide your revenue for each group of
     similar products and services or tell us where you made this disclosure in
     your financial statements. Please see paragraph 37 of SFAS 131. It appears
     that you should disclose the components of revenue in the financial
     statement at least at the level you disclose in MD&A on page 50.

          Response:
          --------


                                       15




          We will include premium revenue information in tabular format from our
     MD&A in our Note 3 - Segment Information to the Notes to Consolidated
     Financial Statements for each year presented in our 10-K commencing with
     the 2007 10-K.

Note 1. Organization and Summary of Significant Accounting Policies
- -------------------------------------------------------------------
Investments, page F-10
- ----------------------

4.   It is apparent that you invest significantly in mortgage and asset-backed
     securities. Please revise your accounting policy note to include a
     discussion of the accounting treatment applied to your investments in
     mortgage and asset backed securities. Specifically indicate how you handle
     differences in actual prepayment assumptions from your original estimates.
     Separately reference for us in your response the authoritative literature
     you rely upon to support your accounting.

     (Additional comment provided on January 28, 2008) Please revise your
     proposed disclosure in response to our previous comment 4 (above) to
     disclose the significant assumptions underlying your prepayment estimates
     as required by paragraph 19 of Statement of Financial Accounting Standards
     No. 91.

          Response:
          --------

          We will include the following disclosure in Note 1 - Organization and
     Summary of Significant Accounting Policies under "Investments" to the Notes
     to Consolidated Financial Statements in our 2007 10-K.

          The accounting treatment applied to the Company's investments in
     mortgage-backed and asset-backed securities is in accordance with Statement
     of Financial Accounting Standards No. 91, "Accounting for Nonrefundable
     Fees and Costs Associated with Originating or Acquiring Loans and Initial
     Direct Costs of Leases". Anticipated prepayments and expected maturities
     are utilized in applying the interest rate method to our mortgage-backed
     and asset-backed securities. An effective yield is calculated based on
     projected principal cash flows at the time of original purchase. The
     effective yield is used to amortize the purchase price of the security over
     the security's expected life. Book values are adjusted to reflect the
     amortization of premium or accretion of discount on a monthly basis.

          The projected principal cash flows are based on certain prepayment
     assumptions which are generated using a prepayment model. The prepayment
     model uses a number of factors to estimate prepayment activity including
     the current levels of interest rates (refinancing incentive), time of year
     (seasonality), economic activity (including housing turnover), and term and
     age of the underlying collateral (burnout, seasoning). Prepayment
     assumptions associated with the mortgage-backed and asset-backed securities
     are reviewed on a periodic basis. When changes in prepayment assumptions
     are deemed necessary as the result of actual prepayments differing from
     anticipated prepayments, securities are revalued based upon the new
     prepayment assumptions utilizing the retrospective adjustment method,
     whereby the effective yield is recalculated to reflect actual payments to
     date and anticipated future payments. The


                                       16




     investment in such securities is adjusted to the amount that would have
     existed had the new effective yield been applied since the acquisition of
     the security. Such adjustments, if any, are included in net investment
     income for the current period being reported.

          We will include the following disclosure in "Item 1 - Description of
     Business - Investments" section of our 2007 10-K.

          Prepayment assumptions associated with the mortgage-backed and
     asset-backed securities are reviewed on a periodic basis. When changes in
     prepayment assumptions are deemed necessary as the result of actual
     prepayments differing from anticipated prepayments, securities are revalued
     based upon the new prepayment assumptions utilizing the retrospective
     adjustment method, whereby the effective yield is recalculated to reflect
     actual payments to date and anticipated future payments. The investment in
     such securities is adjusted to the amount that would have existed had the
     new effective yield been applied since the acquisition of the security.
     Such adjustments are included in net investment income for the current
     period being reported. The adjustments decreased net investment income and
     net income by immaterial amounts in 2007, 2006 and 2005.


                                       17




     We welcome the opportunity to discuss any of the information included
herein should you desire. If you have any questions or comments concerning this
response letter, please contact the undersigned at 914-933-6025 (phone),
914-933-6033 (fax) or bwiley@navg.com.



                                Sincerely yours,

                                /s/ Bradley D. Wiley
                                ---------------------------

                                Bradley D. Wiley
                                Senior Vice President,
                                Financial Compliance
                                Officer and Chief Risk Officer




                                       18