Exhibit 16.1 Arthur Andersen LLP June 11, 2002 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Dear Sir or Madam: We have read the second and third paragraphs of Item 4 included in the Current Report on Form 8-K dated June 10, 2002 of Contango Oil & Gas Company to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, Arthur Andersen LLP Cc: Mr. Ken Peak Contango Oil & Gas Company