Download image Scanned by John Osborne, Dickinson College Scan date 03/19/2008 Depicted ContentSlack, William Yarnel Depicted ContentSlack, William Yarnel Image type engraving Original caption Brigadier-General Wm. Y. Slack, C.S.A. In command of a division at Wilson's Creek. Mortally wounded at Pea Ridge. (From a photograph.) Source citation The Century, Battles and Leaders of the Civil War: People's Pictorial Edition (New York: The Century Co., 1894), 34.