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                                                                   P.O. Box 2600
                                                     Valley Forge, PA 19482-2600

                                                                    610-503-5693
                                                      Natalie_S_Bej@vanguard.com







Christian Sandoe, Esq.
Securities and Exchange Commission          VIA ELECTRONIC FILING
100 F Street, NE
Washington, D.C. 20549

Re:      Vanguard Montgomery Funds (the "Trust")
         File No. 333-145624



Dear Mr. Sandoe,

     The  following  responds to your  comments of September  13,  2007,  to the
Trust's Registration Statement on Form N-14 (the "Registration Statement"), that
was filed  with the  Commission  on August  22,  2007.  Set forth  below are the
staff's comments and the Trust's responses.  In this letter,  Vanguard(R) Market
Neutral Fund, the series of the Trust, is referred to as the "Fund."

GENERAL
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     1.   Comment:   Please  request   acceleration   of   effectiveness   in  a
          pre-effective amendment to the Registration Statement.

          Response:  The Trust will file  Pre-Effective  Amendment  No. 1 to the
          Registration   Statement  today  and  will  request   acceleration  of
          effectiveness to 9:00 a.m. on September 24, 2007 or as soon thereafter
          as possible.

PROSPECTUS
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Investment Advisory Arrangements

     2.   Comment:  Please  explain  how the  Fund's  assets  will be  allocated
          between the two advisers for investment  management purposes after the
          reorganization  of  Laudus  Rosenberg  U.S.  Large/Mid  Capitalization
          Long/Short  Equity  Fund  (the  "Laudus  Fund")  into  the  Fund  (the
          "Reorganization").

          Response:  We have added the  requested  disclosure  on page 17 of the
          prospectus to explain that it is currently anticipated that, after the
          Reorganization, the assets of the Fund will be allocated approximately
          equally  between  AXA  Rosenberg   Investment   Management  LLC  ("AXA
          Rosenberg")  and The  Vanguard  Group Inc.  ("Vanguard")  Quantitative
          Equity Group. The disclosure also provides that the allocations may be
          changed  from time to time and at any time.  It is  anticipated  that,
          immediately  after the  Reorganization,  AXA Rosenberg will manage the
          assets transferred to the Fund from the Laudus Fund as a result of the
          Reorganization  and that thereafter new assets of the Fund as a result
          of subscriptions  will be allocated to Vanguard until such time as the
          assets of the Fund are allocated approximately equally between the two
          advisers.


Christian Sandoe, Esquire
Securities and Exchange Commission
September 20, 2007
Page 2

How the  Reorganization  Will  Affect the  Laudus  Fund -  Comparing  Investment
Objectives, Strategies, and Policies
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     3.   Comment:  Please  highlight  the  differences,  if  any,  between  the
          investment  objectives,  strategies  and  policies of the Fund and the
          Laudus Fund.

          Response:  Vanguard believes that the proposed  investment  objective,
          policies and strategies of the Fund are substantially similar to those
          of the Laudus  Fund and,  thus,  does not  believe  that there are any
          differences that would need to be highlighted.

Comparing Risk Factors
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     4.   Comment:  The  description of short selling risk states in part:  "The
          Vanguard  Fund  may not  always  be  able  (or  find  it  economically
          attractive)  to sell  short a  security  the  Adviser  believes  to be
          particularly  undervalued.   In  that  case,  the  Vanguard  Fund  may
          establish a short  position in a  different  security,  and that short
          position  may be less  profitable  for the  Vanguard  Fund than if the
          Vanguard  Fund had shorted the security the Adviser  believed was more
          undervalued." Please correct the term "undervalued" to "overvalued" in
          these sentences.

          Response:  The  corrections  have been made.  Please see page 8 of the
          prospectus.


Fee Table
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     5.   Comment:  The  disclosure  indicates that both the Laudus Fund and the
          Fund may invest in ETFs.  Please  include the line item "Acquired Fund
          Fees and  Expenses"  in the fee table for the Laudus  Fund  and/or the
          Fund,  as  applicable,  as  required  pursuant to Item 3 of Form N-1A,
          unless the fees and  expenses  indirectly  incurred by the Laudus Fund
          over the past year, or  anticipated  to be incurred by the Fund in its
          current year, as a result of investment in shares of other  investment
          companies do not exceed 0.01 per cent of the average net assets of the
          Laudus Fund or the Fund, respectively.

          Response:  The Fund  does not  expect  to  indirectly  incur  fees and
          expenses as a result of its investment in other  investment  companies
          in its  current  year that  exceed  0.01 per cent of its  average  net
          assets.  Counsel to the Laudus Fund has confirmed that the Laudus Fund
          has  not  indirectly  incurred  fees  and  expenses  as  a  result  of
          investment in other investment  companies that exceed 0.01 per cent of
          its average net assets. Therefore, the line item has not been added to
          the fee table.

     6.   Comment:  Please  reformat the fee table by share  class,  so that the
          current  fees and expenses  for the  Institutional  share class of the
          Laudus Fund,  the  estimated  fees and expenses for the  Institutional
          share  class of the Fund and the pro forma fees and  expenses  for the
          Institutional  share class after the  Reorganization  are side by side
          and the current fees and expenses for the Investor  share class of the
          Laudus Fund,  the estimated  fees and expenses for the Investor  share
          class of the Fund and the pro forma fees and expenses for the Investor
          share class after the Reorganization are side by side.

          Response:  The  requested  change  has been  made.  See page 11 of the
          prospectus.



Christian Sandoe, Esquire
Securities and Exchange Commission
September 20, 2007
Page 3

     7.   Comment:  The  Laudus  Fund  imposes  a 2%  redemption  fee on  shares
          redeemed or exchanged  within 30 days of  purchase,  and the Fund will
          impose a 1%  redemption  fee on  shares  redeemed  within  one year of
          purchase by selling or by exchanging to another Vanguard fund, or if a
          shareholder's  shares are redeemed because the shareholder's  Vanguard
          Fund account  balance falls below the minimum  initial  investment for
          any reason,  including  market  fluctuation.  Please  disclose how the
          one-year  holding  period for Fund  shares  issued to the Laudus  Fund
          shareholders in the Reorganization will be calculated, i.e., when will
          the one-year period begin for these shares?

          Response:  We have  added  disclosure  to  explain  that  Laudus  Fund
          shareholders on the date of the Reorganization  will not be subject to
          the 1%  Vanguard  Fund  redemption  fee on Fund  shares  issues in the
          Reorganization. Please see pages 14 and 33 of the prospectus.

Capitalization Table
- --------------------

     8.   Comment:  Please complete the information for the capitalization table
          in a pre-effective amendment.

          Response:  The  information  for the  capitalization  table  has  been
          included  in  Pre-Effective   Amendment  No.  1  to  the  Registration
          Statement being filed today. Please see page 13 of the prospectus.

STATEMENT OF ADDITIONAL INFORMATION
- -----------------------------------

Investment Limitations - Industry Concentration
- -----------------------------------------------

     9.   Comment:  Please supplementally explain how Vanguard monitors industry
          concentration limits in a multimanager context.

          Response:  The Fund continuously  monitors investment  limitations and
          will notify an adviser if the Fund is  approaching  limitations on the
          level of any  adviser's  investment in any one industry to ensure that
          the Fund does not exceed the 25% industry limit.

Description of Compensation
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     10.  Comment: The Vanguard portfolio manager's  compensation is determined,
          in  part,  by  gross,  pre-tax  performance  of the Fund  relative  to
          expectations for how the Fund should have performed,  given the Fund's
          investment objective,  policies,  strategies and limitations,  and the
          market environment during the measurement period.  Please disclose the
          benchmark  to be used to  measure  performance  for  purposes  of this
          compensation and the measurement period.

          Response: We have added the requested  disclosure.  Please see page 41
          of the statement of additional information.

Christian Sandoe, Esquire
Securities and Exchange Commission
September 20, 2007
Page 4

Tandy Requirements

The Trust  acknowledges  that, with respect to the filing made by the Trust with
the Commission and reviewed by the staff:

     o    the  Trust  is  responsible  for  the  adequacy  and  accuracy  of the
          disclosure in the filing;
     o    staff  comments or changes to disclosure in response to staff comments
          in the filing  reviewed by the staff do not foreclose  the  Commission
          from taking any action with respect to the filing; and
     o    The Trust 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 Untied States.

We hope the staff finds this letter and the revisions in Pre-Effective Amendment
No.  1  responsive  to  the  staff's  comments  on  the  initial  filing  of the
Registration  Statement.  The  Trust  intends  to  request  acceleration  of the
effective date of its Registration Statement to September 24, 2007.

Please contact me at (610) 503 5693 with any questions or comments regarding the
above responses.

Sincerely,



Natalie S. Bej
Senior Counsel