Holmes, William C. (January 28, 1975). "Oral History Interview with William Holmes". Heritage West. Pikes Peak Library District Special Collections (Interview). Interviewed by Anne F. Hartung. Colorado Springs, Colorado. Archived from the original(mp3) on September 3, 2014. Retrieved July 13, 2014.
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"Thorough-bred Cattle In El Paso County, p.2". Colorado Springs Gazette. Colorado Springs, El Paso County, Colorado: "Out West" Printing and Publishing Co. November 14, 1874. Retrieved July 24, 2014.
"Untitled news item, p.3, Col.1". Colorado Weekly Chieftain. Pueblo, Pueblo County, Colorado: J. J. Lambert. October 31, 1878. Retrieved July 24, 2014.
Bogue, Dorothy (2009). "The Van Briggle Story". Van Briggle Pottery and Tile. Retrieved October 21, 2014.
web.archive.org
Holmes, William C. (January 28, 1975). "Oral History Interview with William Holmes". Heritage West. Pikes Peak Library District Special Collections (Interview). Interviewed by Anne F. Hartung. Colorado Springs, Colorado. Archived from the original(mp3) on September 3, 2014. Retrieved July 13, 2014.