This shell casing was recovered from excavations at the Plaster House site, a dugout in Gray County. The casing has a head stamp of "Winchester No. 10." The occupants of the dugout were most likely the family of Oliver and Anna Mitchell; Oliver Mitchell was described in his obituary as a horse rancher. Settlement in this area of Kansas mostly post-dated the construction of the Atchison, Topeka and Santa Fe Railroad in 1872 and experienced a boom during with the construction of the Soule Canal in the mid-1880s.