Your ancestor only has two cards in his file a cover and an undated muster card. I gather you have the information regarding the organization of Abbotts Company? Organized Okolona, Chickasaw County, June 9, 1863. By whom: By the company themselves

Davenport's Battalion, Cavalry (State Troops) AND Capt. Abbott's Co., Cavalry AND Capt. Armistead's Co., Partisan Rangers AND Capt Bowen’s Co.(Chulahoma Cavalry) AND Capt. Brown’s Co. (Foster Creek Rangers), Cavalry AND Capt. Buck's Co., Cavalry AND Butler’s Co., Cavalry Reserves

You can go to this site and check out some of the units into which Abbotts comapny was merged into.

http://www.mississippiscv.org/mississippi_history.htm

GP