A. S. “Bud” Gillespie was an Albany County, Wyoming, rancher and co-author with R. H. Burns and Willing G. Richardson of the book Wyoming’s Pioneer Ranches, which was published in 1955. Gillespie was born in 1887, the son of Samuel W. and Maggie H. (White) Gillespie. Bud Gillespie worked as a cowboy for the Swan Land and Cattle Company and gained fame as a rodeo performer during the early 1900s. He took over operation of the Gillespie ranch on the Laramie River in 1914 and bought the former Taylor ranch on Rock Creek in 1922. After his retirement he moved to Laramie, Wyoming, and became an authority and writer on the history of Albany County.
From the guide to the Andrew Springs Gillespie papers, circa 1895-1965, (University of Wyoming. American Heritage Center.)
