EXHIBIT 16.1 March 27, 1998 Securities and Exchange Commission Mail Stop 9-5 450 5th Street, NW Washington, D.C. 20549 Dear Sirs/Madams: We have read and agree with the comments in Item 4 of Form 8-K of Union Pacific Resources Group Inc. dated March 27, 1998 Yours truly, /s/ Deloitte & Touche LLP - ------------------------- Deloitte & Touche