Yikes, there are three 15th Arkansas Infantry organizations.

His file is found in Gee’s, afterwards Johnson’s, 15th Arkansas Infantry. He is recorded as a Private, Company G, Hills Regt. Ark on the Alton, Ill. prison card.

This file is found in the Fold3 index under Fourteenth(Power’s) Infantry, V-Z and Fifteenth Infantry. National Archives microfilm, Microform M317, Roll 136