See http://www.usgennet.org/usa/ms/county/attala/15thmscoIroster%5B5%5D.htm & http://www.choctawgrays.com/links.html
Also: 15th Mississippi, "A Hard Trip, A History of the Fifteenth Infantry, CSA,".by Ben Wynne. Published by Wynne Mercer University Press. Book is 252 pages
His 17 card record file may be obtained through the service noted above.
George Martin