Wish I knew...A 90 year old woman, wife of the grandson of Gideon Pillow, who lives in the Tappan Pillow house was telling me about it. Will have to do some investigating I guess. I can't imagine a flag, wrapped around a gun stock in one of the loess caves existing this long. She said it was blue like Bonnie Blue flag....made me wonder if it was a Missouri flag or a U.S. Regimental, but she called,it a Confederate flag