A.S. "Bud" Gillespie was an Albany County, Wyoming rancher and author of books about Wyoming history. Gillespie worked as a cowboy for the Swan Land and Cattle Company and performed in rodeos during the early 1900s. He took over operation of the Gillespie Ranch on the Laramie River and bought the former Taylor Ranch on Rock Creek in 1922. He later became an authority and writer on the early history of Albany County.
From the description of Andrew Springs Gillespie papers, ca. 1895-1965. (University of Wyoming, American Heritage Center). WorldCat record id: 45998748