The following publications contain information about William Jackson:
Article: "Faces, Features, Memorabilia" • A look at Sgt. Charles White, Lt. Edward J. McClernand, scout William Jackson and Capt. Henry James Nowlan. • Greasy Grass, Journal of the Custer Battlefield Historical & Museum Association, Vol. 15, May 1999.
Article: "Fred Girard: A Real Custer Scout" • Girard's premature death in 1925 deprived Walter M. Camp of the opportunity to write Girard's definitive account of the Little Big Horn. A 1914 newspaper article provides a glimpse into what he might have said. • Greasy Grass, Journal of the Custer Battlefield Historical & Museum Association, Vol. 17, May 2001.