1 EXHIBIT 16.1 December 10, 1997 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 Form 8-K of Union Pacific Resources Group Inc. dated December 10, 1997. Yours truly, /s/ Deloitte & Touche LLP Deloitte & Touche