November 17, 2004

Christian Sandoe, Esq.
Division of Investment Management
U.S. Securities and Exchange Commission via electronic filing
450 Fifth Street,
N.W., Fifth Floor
Washington, D.C. 20549

Re:  Vanguard Convertible Securities Fund

Dear Mr. Sandoe:

     The  following  responds  to your  comments  of  November  15,  2004 on the
post-effective  amendment of the registration  statement of Vanguard Convertible
Securities  Fund.  You  commented  on PEA number 27 that was filed on October 1,
2004 pursuant to Rule 485(a).

COMMENT 1:  PROSPECTUS - PRIMARY INVESTMENT STRATEGIES
COMMENT:          Vanguard defines convertible securities to include corporate
                  bonds and preferred stocks that are convertible into common
                  stock, as well as debt securities with warrants or common
                  stock attached. How do the debt securities with warrants or
                  common stock attached fit the definition of convertible
                  securities if these debt securities are not technically
                  convertible?

RESPONSE:         The securities in question are equity-linked debt securities.
                  Given that they are fixed income instruments with the option
                  to gain equity exposure via the warrants or detachable stock,
                  they have economic characteristics substantially similar to
                  the other securities held by the fund.


COMMENT 2:        PROSPECTUS - PRIMARY RISKS
COMMENT:          Sector risk is listed as a primary risk, but no specific
                  sectors are listed.  Please provide more specific information
                  regarding these sectors.

RESPONSE:         We are removing the sector risk bullet from the list of
                  primary risks in the fund profile, as well as from the Item 4
                  disclosure since there are no specific sectors at this time
                  that present a primary risk to investors in the fund. This
                  disclosure was appropriate a few years ago when tech stocks
                  were very prevalent, but is no longer appropriate and should
                  be deleted.


COMMENT 3:        PROSPECTUS - PRIMARY RISKS
COMMENT:          In the Credit Risk section Vanguard says, "Companies that
                  issue convertible securities are often small to medium size,
                  and they often have low credit ratings." Accordingly, there
                  should be a statement describing small and mid-cap market
                  risk.

RESPONSE:         We do not plan to add a statement describing small and mid-cap
                  market risk. The fund primarily owns debt securities that are
                  convertible to equity securities. It is true that the
                  companies issuing these securities are often small to medium
                  size. However, since the debt securities are very rarely, if
                  ever, held to conversion, shareholders are seldom, if ever,
                  exposed to the market-cap risks of the equity securities. The
                  real risk to fund shareholders based on the size of the
                  issuers is the low credit rating of these issuers.
                  Accordingly, we think the existing disclosure is appropriate.

COMMENT 4: - PROSPECTUS - AVERAGE ANNUAL TOTAL RETURN TABLE
COMMENT:          Fix the date in the first footnote to the table.

RESPONSE:         We have fixed the date.

COMMENT 5: - PROSPECTUS - AVERAGE ANNUAL TOTAL RETURN TABLE
COMMENT:          A fund cannot use a brand new index as a broad-based index.

RESPONSE:         The Merrill Lynch All US Convertibles Index has been in
                  existence for at least the past ten years. We did not
                  initially include the performance for this benchmark in the
                  table since the table shows performance through December 31,
                  2003, and the new benchmark will not take effect until
                  December 1, 2004. However, to avoid confusion, we will include
                  the Merrill Lynch benchmark's performance in our 485(b)
                  filing, and it will appear in the printed prospectus.

COMMENT 6: - PROSPECTUS - FEES AND EXPENSES
COMMENT:          You commented regarding the difference between the fund's
                  expense ratio for fiscal year 2003 (0.84%), which is included
                  in our Plain Talk About Expenses, compared to the estimated
                  expense ratio for fiscal 2004 (0.71%), which is included in
                  the Annual Fund Operating Expense table. You noted that we
                  should explain the drop in expenses from 2003 to 2004.

RESPONSE:         We included the estimated expense ratio in the Annual Fund
                  Operating Expense table since this prospectus includes six-
                  month financials derived from the shareholder report.  We will
                  update the Plain Talk About Expenses to include this estimated
                  expense ratio for 2004 rather than the actual 2003 expense
                  ratio, so there will not be a discrepancy between the expense
                  ratios in the table and the Plain Talk box.  We do not plan to
                  include text explaining the difference in expense ratio from
                  2003 to 2004


                  since it is solely attributable to an increase of
                  over $200 million in the fund's asset base.

COMMENT 7: - PROSPECTUS - MORE ON THE FUND
COMMENT: IF THE FUND'S OBJECTIVE IS NON-FUNDAMENTAL, STATE THAT FACT IN THE
         PROSPECTUS.

RESPONSE:         The fund's objective is fundamental, so we will add the
                  missing disclosure to the list of fundamental objectives
                  in the SAI.

COMMENT 8: - SAI - BOARD REVIEW OF INVESTMENT ADVISORY ARRANGEMENTS
COMMENT:          FLESH OUT THE DISCUSSION OF WHAT THE BOARD CONSIDERED IN
                  REVIEWING THE ADVISORY ARRANGEMENTS FOR THE FUND.

RESPONSE:         We have expanded the discussion of the board's consideration
                  of the fund's advisory arrangements.  (See attached.)

COMMENT 9:        TANDY REQUIREMENTS
COMMENT:          The SEC is now requiring all registrants to provide at the end
                  of response letters to registration statement comments, the
                  following statements:
                    o    The Fund is  responsible  for the adequacy and accuracy
                         of the disclosure in the filing.
                    o    Staff comments or changes in response to staff comments
                         in the filings  reviewed by the staff do not  foreclose
                         the  Commission  from taking any action with respect to
                         the filing.
                    o    The Fund 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.

RESPONSE:         AS REQUIRED BY THE SEC, WE WILL PROVIDE THE FOREGOING
                  ACKNOWLEDGEMENTS.

                                                * * * * *

              AS REQUIRED BY THE SEC, THE FUND ACKNOWLEDGES THAT:

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

     Please  contact  me at  (610)  669-1538  with  any  questions  or  comments
regarding the above responses or the accompanying attachment. Thank you.

Sincerely,



Judith L. Gaines
Associate Counsel

Attachment


                                   ATTACHMENT

BOARD REVIEW OF INVESTMENT ADVISORY ARRANGEMENTS. The Fund's board of trustees
oversees the Fund's management and performance on a regular basis, and the board
determines annually whether to approve and renew the Fund's investment advisory
agreement. Vanguard provides the board with monthly, quarterly, and annual
analyses of the advisor's performance. In addition, the investment advisor
provides the board with quarterly self-evaluations and certain other information
the board deems important to evaluate the short- and long-term performance of
the advisor. The Fund's portfolio managers meet with the board periodically to
discuss the management and performance of the Fund.

 When considering whether to renew an investment advisory contract, the board
examines several factors, but does not identify any particular factor as
controlling their decision. Some of the factors considered by the board include:
the nature, extent, and quality of the advisory services provided as well as
other material facts, such as the investment performance of the Fund's assets
managed by the advisor and the fair market value of the services provided. The
board reviews and considers the extent to which the advisor has realized or will
realize economies of scale as the Fund grows. Additional information is provided
to the board detailing other sources of revenue to the advisor or its affiliates
from its relationship with the Fund and intangible or "fall-out" benefits that
accrue to the advisor and its affiliates, if relevant, and the advisor's control
of the investment expenses of the Fund, such as transaction costs, including
ways in which portfolio transactions for the Fund are conducted and brokers are
selected.

 For Vanguard Convertible Securities Fund, the board also takes into account the
nature of the fee arrangements, which include breakpoints that will adjust the
fee downward as the size of the Fund increases and a performance adjustment that
is designed to benefit shareholders by aligning the advisor's fee with the
investment returns delivered to shareholders.

 The board also reviews the investment performance of the Fund compared with a
peer group of funds and an appropriate index or combination of indexes, in
addition to a comparative analysis of expense ratios of, and advisory fees paid
by, similar funds. Credit Suisse First Boston is eliminating the Credit Suisse
First Boston Convertible Securities Index, which was the benchmark index for the
Fund. Accordingly, the Fund's board of trustees approved Merrill Lynch All US
Convertibles Index, a similar index tracking U.S. corporate convertible
securities, as the new benchmark index, effective December 1, 2004.

 In its most recent review of the Fund's advisory agreement, the board
identified no single factor that controlled the decision. The primary factors
underlying the board's determination to renew the fund's advisory arrangements
were as follows:


                                                                                              
                                                                                                                    ADVISORY FEES
                                                AVERAGE ANNUAL RETURN (BEFORE TAXES)                              EXPRESSED AS AN
                                                ------------------------------------                             ANNUAL EFFECTIVE
                                      1 YEAR ENDED      5 YEARS ENDED      10 YEARS ENDED                      RATE OF THE FUNDS'
                                        11/30/2003         11/30/2003          11/30/2003    EXPENSE RATIO     AVERAGE NET ASSETS
                                       -----------       ------------      --------------    -------------     ------------------
VANGUARD CONVERTIBLE                        28.07%              9.79%               8.71%            0.84%                  0.38%
 SECURITIES FUND
Average Convertible Securities Fund*        22.06               7.03                8.44             1.49                   0.62
CS First Boston Convertible
 Securities Index**                         23.66               8.28                9.12              N/A                    N/A
Merrill Lynch All US
 Convertibles Index**                       22.47               7.46                9.30              N/A                    N/A
 *Derived from data provided by Lipper Inc.
**Credit  Suisse First  Boston is  eliminating  the CS First Boston  Convertible
Securities  Index.  The Fund's board of trustees  approved  Merrill Lynch All US
Convertibles Index as the new benchmark, effective December 1, 2004.


- -    The board considered the Fund's short- and long-term  performance  records,
     which are  disclosed  in the table  above.  The board  determined  that the
     performance  results for the Fund were  reasonable,  particularly  over the
     long-term,  as compared with relevant performance standards,  including the
     performance  results of the  average  peer group  fund  (derived  from data
     provided by Lipper Inc.) and other appropriate benchmarks.

- -    The board assessed the advisory fee paid by the Fund and compared it to the
     average  advisory fee for the Fund's Lipper peer group. The board took into
     account the nature of the fee arrangements,  which include breakpoints that
     decrease the fee rate as the size of the advisor's portfolio increases. The
     board  concluded  that the advisory fee paid to Oaktree was  reasonable and
     was significantly  less that the average advisory fee paid by others in the
     Fund's Lipper peer group.

- -    The board evaluated the advisor's investment staff and portfolio management
     process,  and  reviewed  the  composition  and overall  performance  of the
     advisor's portfolio on both a short-term and long-term basis. Following the
     review,  the  board  noted  the  portfolio  management  team's  outstanding
     experience and education. The board concluded that the advisor's investment
     staff and portfolio management process were solid and were suitable for the
     Fund.

- -    Finally,  the board considered  whether the Fund should obtain  alternative
     portfolio   management   services  and  concluded   that,   under  all  the
     circumstances  and  based  on its  informed  business  judgment,  the  most
     appropriate   course  of  action  in  the  best   interest  of  the  Fund's
     shareholders was to renew the agreement with Oaktree.