UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                                (Amendment No. )*

                       OSCIENT PHARMACEUTICALS CORPORATION
                       -----------------------------------
                                (Name of Issuer)

                     Common Stock, $0.10 par value per share
                     ---------------------------------------
                         (Title of Class of Securities)

                                    68812R105
                                    ---------
                                 (CUSIP Number)

                                   May 12, 2004
                                   ------------
                      (Date of Event which Requires Filing
                               of this Statement)

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

                                [ ] Rule 13d-1(b)
                                [X] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)


*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

                          Continued on following pages
                               Page 1 of 10 Pages
                              Exhibit List: Page 9



                                  SCHEDULE 13G

CUSIP No.  68812R105                                          Page 2 of 10 Pages


1        Names of Reporting Persons
         I.R.S. Identification Nos. of above persons (entities only)

                  SAGAMORE HILL CAPITAL MANAGEMENT, L.P.

2        Check the Appropriate Box If a Member of a Group (See Instructions)
                                               a. [ ]
                                               b. [X]

3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                            5             Sole Voting Power
Number of                                          5,877,846
  Shares
Beneficially                6             Shared Voting Power
  Owned By                                         0
    Each
Reporting                   7             Sole Dispositive Power
    Person                                         5,877,846
    With
                            8             Shared Dispositive Power
                                                   0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                    5,877,846

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares (See Instructions)

                                    [ ]

11       Percent of Class Represented By Amount in Row (9)

                                    7.4%

12       Type of Reporting Person (See Instructions)

                                    PN




                                  SCHEDULE 13G

CUSIP No.  68812R105                                          Page 3 of 10 Pages


1        Names of Reporting Persons
         I.R.S. Identification Nos. of above persons (entities only)

                  SAGAMORE HILL CAPITAL ADVISORS, LLC

2        Check the Appropriate Box If a Member of a Group (See Instructions)
                                               a. [ ]
                                               b. [X]

3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                            5             Sole Voting Power
Number of                                          5,877,846
  Shares
Beneficially                6             Shared Voting Power
  Owned By                                         0
    Each
Reporting                   7             Sole Dispositive Power
    Person                                         5,877,846
    With
                            8             Shared Dispositive Power
                                                   0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                    5,877,846

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares (See Instructions)

                                    [ ]

11       Percent of Class Represented By Amount in Row (9)

                                    7.4%

12       Type of Reporting Person (See Instructions)

                                    OO



                                  SCHEDULE 13G

CUSIP No.  68812R105                                          Page 4 of 10 Pages


1        Names of Reporting Persons
         I.R.S. Identification Nos. of above persons (entities only)

                  STEVEN H. BLOOM

2        Check the Appropriate Box If a Member of a Group (See Instructions)
                                               a. [ ]
                                               b. [X]

3        SEC Use Only

4        Citizenship or Place of Organization

                  UNITED STATES

                            5             Sole Voting Power
Number of                                          5,877,846
  Shares
Beneficially                6             Shared Voting Power
  Owned By                                         0
    Each
Reporting                   7             Sole Dispositive Power
    Person                                         5,877,846
    With
                            8             Shared Dispositive Power
                                                   0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                    5,877,846

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares (See Instructions)

                                    [ ]

11       Percent of Class Represented By Amount in Row (9)

                                    7.4%

12       Type of Reporting Person (See Instructions)

                                    IN; HC




                                                              Page 5 of 10 Pages


Item 1(a)         Name of Issuer:

                  Oscient Pharmaceuticals Corporation (the "Issuer")

Item 1(b)         Address of the Issuer's Principal Executive Offices:

                  100 Beaver Street, Waltham, Mass. 02453

Item 2(a)         Name of Person Filing:

                  The  Statement  is filed on  behalf  of each of the  following
persons (collectively, the "Reporting Persons"):

                  i) Sagamore  Hill Capital  Management,  L.P.  ("Sagamore  Hill
Capital Management");

                  ii) Sagamore Hill Capital Advisors,  LLC ("Capital Advisors");
and

                  iii) Steven H. Bloom ("Mr. Steven Bloom");

                  This  statement  relates to Shares (as  defined  herein),  and
securities  convertible  into Shares,  held for the account of the Sagamore Hill
Hub  Fund  Ltd.,  a Cayman  Islands  corporation  ("Hub  Fund").  Pursuant  to a
portfolio  management  agreement,  Sagamore  Hill Capital  Management  serves as
investment manager of the Hub Fund. The General Partner of Sagamore Hill Capital
Management is Capital  Advisors.  Mr. Steven Bloom is the sole member of Capital
Advisors.

Item 2(b)         Address of Principal Business Office or, if None, Residence:

                  The address of the  principal  business  office of each of the
Reporting Persons is 2 Greenwich Office Park, Greenwich, CT 06831.

Item 2(c)         Citizenship:

                  1) Sagamore  Hill  Capital  Management  is a Delaware  limited
partnership;

                  2) Capital Advisors is a Delaware limited liability company;
and

                  3) Mr. Steven Bloom is a citizen of the United States.

Item 2(d)         Title of Class of Securities:

                  Common Stock, $0.10 par value per share (the "Shares").

Item 2(e)         CUSIP Number:

                  68812R105

                                                              Page 6 of 10 Pages

Item 3.           If  this  statement  is  filed  pursuant  to Rule 13d-1(b), or
                  13d-2(b) or (c), check whether the person filing is a:

                  This Item 3 is not applicable.

Item 4.           Ownership:

Item 4(a)         Amount Beneficially Owned:

                  As  of  the  date  hereof,   each  of  Sagamore  Hill  Capital
Management,  Capital  Advisors and Mr. Steven Bloom may be deemed the beneficial
owner of  5,877,846  Shares  held for the account of the Hub Fund  assuming  the
conversion of certain convertible bonds held for the account of the Hub Fund.

Item 4(b)         Percent of Class:

                  The number of Shares of which each of  Sagamore  Hill  Capital
Management,  Capital Advisors and Mr. Steven Bloom may be deemed to beneficially
own  constitutes  7.4% of the total  number of Shares  outstanding  (based  upon
information  provided by the Issuer in its most recently-filed  quarterly report
on Form 10-Q,  the number of Shares  outstanding  was  74,383,975  as of May 10,
2004), assuming the conversion of certain convertible bonds held for the account
of the Hub Fund.

Item 4(c)         Number of shares as to which such person has:

Sagamore Hill Capital Management
(i)       Sole power to vote or direct the vote:                       5,877,846
(ii)      Shared power to vote or to direct the vote                           0
(iii)     Sole power to dispose or to direct the disposition of        5,877,846
(iv)      Shared power to dispose or to direct the disposition of              0

Capital Advisors
(i)       Sole power to vote or direct the vote:                       5,877,846
(ii)      Shared power to vote or to direct the vote                           0
(iii)     Sole power to dispose or to direct the disposition of        5,877,846
(iv)      Shared power to dispose or to direct the disposition of              0

Mr. Steven Bloom
(i)       Sole power to vote or direct the vote:                       5,877,846
(ii)      Shared power to vote or to direct the vote                           0
(iii)     Sole power to dispose or to direct the disposition of        5,877,846
(iv)      Shared power to dispose or to direct the disposition of              0

Item 5.           Ownership of Five Percent or Less of a Class:

                  This Item 5 is not applicable.




                                                              Page 7 of 10 Pages

Item 6.           Ownership  of  More  than  Five  Percent  on Behalf of Another
                  Person:

                  The shareholders of the Hub Fund have the right to participate
in the receipt of dividends  from, or proceeds from the sale of, the  securities
held  for  the  account  of the Hub  Fund in  accordance  with  their  ownership
interests in the Hub Fund.

Item 7.           Identification  and  Classification  of  the  Subsidiary Which
                  Acquired the Security Being Reported on by the Parent  Holding
                  Company or Control Person:

                  This Item 7 is not applicable.

Item 8.           Identification and Classification of Members of the Group:

                  This Item 8 is not applicable.

Item 9.           Notice of Dissolution of Group:

                  This Item 9 is not applicable.

Item 10.          Certification:

                  By signing below each of the Reporting Persons certifies that,
to the best of such person's  knowledge and belief,  the securities  referred to
above were not  acquired  and are not held for the purpose of or with the effect
of changing or influencing the control of the Issuer of such securities and were
not  acquired and are not held in  connection  with or as a  participant  in any
transaction having such purpose or effect.





                                                              Page 8 of 10 Pages

                                   SIGNATURES

          After  reasonable  inquiry and to the best of my knowledge and belief,
the  undersigned  certifies that the  information set forth in this statement is
true, complete and correct.


Date: May 25, 2004                    SAGAMORE HILL CAPITAL MANAGEMENT, L.P.


                                      By: /s/ Steven H. Bloom
                                         ----------------------------------
                                         Name:  Steven H. Bloom
                                         Title: President

Date: May 25, 2004                    SAGAMORE HILL CAPITAL ADVISORS, LLC


                                      By: /s/ Steven H. Bloom
                                         ----------------------------------
                                         Name:  Steven H. Bloom
                                         Title: Sole Member

Date: May 25, 2004                    STEVEN H. BLOOM


                                      /s/ Steven H. Bloom
                                      -------------------------------------






                                                              Page 9 of 10 Pages

                                  EXHIBIT INDEX
Exhibit                                                                 Page No.
-------                                                                 --------
A.      Joint Filing Agreement dated as of May 25, 2004, by and
        among Sagamore Hill Capital Management, L.P., Sagamore
        Hill Capital Advisors, LLC, and Mr. Steven H. Bloom..........         10




                                                             Page 10 of 10 Pages

                                    EXHIBIT A

                             JOINT FILING AGREEMENT

          The undersigned  hereby agree that this statement on Schedule 13G with
respect to the common stock of Oscient Pharmaceuticals Corporation,  dated as of
May 25, 2004, is, and any amendments thereto  (including  amendments on Schedule
13D) signed by each of the  undersigned  shall be, filed on behalf of each of us
pursuant to and in accordance  with the  provisions  of Rule 13d-1(k)  under the
Securities Exchange Act of 1934.


Date: May 25, 2004                    SAGAMORE HILL CAPITAL MANAGEMENT, L.P.


                                      By: /s/ Steven H. Bloom
                                         ----------------------------------
                                         Name:  Steven H. Bloom
                                         Title: President

Date: May 25, 2004                    SAGAMORE HILL CAPITAL ADVISORS, LLC


                                      By: /s/ Steven H. Bloom
                                         ----------------------------------
                                         Name:  Steven H. Bloom
                                         Title: Sole Member

Date: May 25, 2004                    STEVEN H. BLOOM


                                      /s/ Steven H. Bloom
                                      -------------------------------------