Shawn,
Two caveats you may already have, but if not, here they are;
Atlanta Constitution July 10, 1883, page 6
VMI Cadets return flag of 164th NY. place and date of capture
not stated.

Alexandria (Va) Gazette Nov. 23, 1901, page 1
17th Va Inf claim capture of 11th Penn. and 103rd NY
at Sharpsburg

Ken