Drew,
My gggf, Lt. Benjamin Franklin Crook, and his twin brother, Capt. Henry Wallace Crook, both served all four years in the 8th - Company C - the "True Confederates." What does the book show as their flag? I believe they had several regimental flags, the initial one being a First National, followed by a AoT St. Andrew's Battle Flag, and lastly, a Hardee.