Lemuel was the son of Richard and Polly Smith Casey and Richard was the son of Micajah Casey of Wayne County, NC (d. 1800). Richard's sister Susan married Urban Lewis and they were the parents of Susan Marinda Lewis, wife of Newman Potts Sr.

Lemuel enlisted October 7, 1862 in Company A, Forty Third Regiment.

Willowdale Cemetery, Goldsboro, NC - Located in the middle of the old part of the Cemetery is a very impressive marker to the UNKNOWN C0NFEDERATE DEAD, many of whom were killed in the Battle of Bentonville in the last days of the Civil War. Probably others were moved from old family plots to rest here in the shade of the old trees and the twittering of the birds and squirels. Much could be written about the lives of the people who lie so peacefully and quiet in this place. Wayne County Cemetery Book.