Title: Sentry Box at Camp Discharge, Gladwyne Abstract: Camp Discharge was a mustering-out camp established in Gladwyne in 1864; originally called Camp Spring Mill Keywords: Civil War/Sentry Box/Camp Discharge Source: Lower Merion Historical Society Archives Binder: 4 Collection: W. Robert Swartz This photo and many others may be found in The First 300: The Amazing and Rich History of Lower Merion, which may be purchased through Diane Publishing Company or in Lower Merion area book stores.