I checked the Riggs that Duncan found in the 12th Texas Cav. and he was 21 in Oct. 1861. He transfered to the 10th. TX. Inf. July 14, 1862 and died at Camp Hope Ark. Sept. 5, 1862. I also found a Asa Pennington in the 10th TX. Inf.,there are a lot of Penningtons in the 10th TX. Inf.
Gary D. Bray