Collection Overview Collection summary derived from "Guidebook to Manuscripts", 1969: Lieutenant Heber M. Creel, of the 7th Cavalry, was assigned to study the ethnology of the Cheyennes. These manuscripts contain a large amount of material concerning the language of the Cheyenne as well as ethnology and philology. In the Gilcrease Library there is a Cheyenne-English dictionary compiled by Rev. Rodolphe Petter, missionary to the Cheyennes in 1891 at Cantonment, Oklahoma, and printed at Kettle Falls, Washington,...