Edmund Wheeler of Ironton, Wis. Sept. 14, 1861 enlisted as private, Co. B, 7th Wis. Infantry Rgt. Sept. 17, 1862 killed on 9/17/1862 at Antietam, Md. and buried in Antietam National Cemetery, Sharpsburg, Md. Gravesite: #3249

Maybe they moved him.

Sources: Roster of Wisconsin Volunteers: War of the Rebellion; The Bivouacs of the Dead