1891 J. L. Workman entered his office June 15th and went west immediately and spent 11 weeks in the deserts of southern Montana and northern Wyoming collecting in the Wasatch beds of the Big Horn Mountains, He was in the field without assistants. O. A. Peterson, who had been a preparator at the National Museum in Washington, D. C. for Prof. O.C. Marsh, was hired Dec., 1891 as an assistant to Dr. Wortman. (There is a report written by Dr. Wortman at the end of 1892 report that seems to be for this year, as it is about his expedition to the Big Horn and Wind River Valleys.)

1892