"Captured at Gettysburg, by "Dow," of Co."D"
It states the captured flag was deposited in the War Department. I do not see the last name "Dow" on Mr. Rollin's list of Confederate flags captured, identified or unidentified. Over 517 last names came up on the National Archives soldier and sailors website. I will search on that and find "Dow" of Company "D".
I will post, if I can find him and his regiment,
Shawn Prouty