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Photo of the Ark of Safety used during the Johnson County War sent to Mrs. Shirley Jacob from the Peter Yegen, Jr. Family found among unprocessed material in the Casper College Western History Center.

Round-up network of men and pack horses at a campsite, part of a series of images documenting sites and individuals also loosely associated with the Johnson County War.

Major Frank Wolcott, F.D. DeBillier, W.E. Guthrie, Fred Hesse, W.C. Irvine, and a group of cattlemen.

Believed to be Winnie, Dolly, Mark, and Dorothy on horseback in front of a log structure.

List of photographs found in Morrison's files.

Freight team at Fort Benton showing covered wagons stationed in front of the T.C. Power & Bro. storefront in what is thought to be Fort Benton.

A recollection of "stray echoes" of the cattleman's war by Moreton Frewen, who was the head of the Powder River Cattle Company in the early 1800s. The recollection was written to S.P. Penton, an individual identified with the life insurance business…

Photograph of the tent city in Antelope in 1866 as found in the photographs and maps separated from Robert B. David's materials collected and organized for his work on the original draft of Malcolm Campbell, Sherriff (1932).

Photograph of Malcolm Campbell dated 1865 as found in the photographs and maps separated from Robert B. David's materials collected and organized for his work on the original draft of Malcolm Campbell, Sherriff (1932).

Photograph of Major F.E. Wolcott as found in the photographs and maps separated from Robert B. David's materials collected and organized for his work on the original draft of Malcolm Campbell, Sherriff (1932).