Exhibit 31.1


                           THE WILLOWBRIDGE FUND L.P.


                                  CERTIFICATION


I, Robert Lerner certify that:

1)    I have reviewed this quarterly report on Form 10-Q of The Willowbridge
      Fund, L.P.

2)    Based on my knowledge, this report does not contain any untrue
      statement of a material fact or omit to state a material fact
      necessary to make the statements made, in light of the circumstances
      under which such statements were made, not misleading with respect
      to the period covered by this report;

3)    Based on my knowledge, the financial statements, and other
      financial information included in this report, fairly present
      in all material respects the financial condition, results of
      operations and cash flows of the registrant as of, and for, the
      periods presented in this report;

4)    The registrant's other certifying officers and I are
      responsible for establishing and maintaining disclosure
      controls and procedures (as defined in Exchange Act Rules
      13a-15(e) and 15d-15(e)) for the registrant and have:

      a)   designed such disclosure controls and procedures, or caused
           such disclosure controls and procedures to be designed under
           our supervision, to ensure that material information relating
           to the registrant is made known to us by others within those
           entities, particularly during the period in which this report
           is being prepared;

      b)   evaluated the effectiveness of the registrant's disclosure
           controls and procedures and presented in this report our
           conclusions about the effectiveness of the disclosure controls
           and procedures, as of the end of the period covered by this
           report based on such evaluation; and

      c)   disclosed in this report any change in the registrant's internal
           control over financial reporting that occurred during the
           registrant's most recent fiscal quarter that has materially
           affected, or is reasonably likely to materially affect, the
           registrant's internal control over financial reporting; and

5)    The registrant's other certifying officers and I have disclosed, based
      on our most recent evaluation of internal control over financial
      reporting, to the registrant's auditors and the audit committee
      of the registrant's board of directors (or persons performing
      the equivalent functions):

      a)   all significant deficiencies and material weaknesses in the design
           or operation of internal control over financial reporting which are
           reasonably likely to adversely affect the registrant's ability to
           record, process, summarize and report financial information; and

      b)   any fraud, whether or not material, that involves management or
           other employees who have a significant role in the registrant's
           internal control over financial reporting.





Date   November 12, 2004



/s/ Robert L. Lerner
-------------------------------------------------
President of Ruvane Investment Corporation,
the general partner of The Willowbridge Fund L.P.