Col. James A. Barrett appears to be James Allen Barrett, born 3-4-1814 Greensburg, KY, son of James Watson and Mary (Allen) Barrett. the family is on the 1850 and 1860 censii of Sangamon County, IL. He married Eliza ___ about 1848. By 1880 he is a farmer in Martin County, KY. The 10th was mustered in 11-25-61 and he resigned his commission 5-2-62. This from genealogical and census info online.