My grandfather, Marion Columbus Hollingsworth, was captured/surrendered (?) at or near Mobile, Ala., in about April 1865. I do not know the name of the Alabama unit he served the CSA in. Family stories say he was sent to Shipp Island in the Gulf of Mexico as a POW. Are there any list on line of those held there, or information about those POWs? When were they pardoned? Are the pardons on file in Alabama Archives and History? Many thanks!