A capsule history of his unit is available at this link.
http://mississippiscv.org/MS_Units/1st_mississippi_light_artillery.htm

Asa M. Piper writes of his experiences at Fort Blakely and Ship Island at this site.
http://www.fincher.org/fincher/62ndA.html

Also see this story of Ship Island from the MHS website.
http://mshistory.k12.ms.us/features/feature70/Ship_Island.htm