Yes, this is the right man. he graduated from the Medical College of Georgia, Augusta. University of Georgia Medical Department. in 1860. His brother W.M. Calloway in the same company was also a physician in Texas after the war. On page 593 of Oates' book he mentions that Corporal J.D. Calloway was promoted to sergeant, May 1863 for meritorious conduct. I was wondering what the meritorious conduct was. The family story goes that the military wanted J.D. to go into the medical corps. He enlisted with his brothers and wanted to serve with them and couldn't do that if he joined the medical corps, so he stayed with his brothers. Frank B. Calloway was killed May 1, 1863 at Suffolk, Virginia. J.D. was wounded at Little Round Top July 2, 1863 and captured, he was sent to Fort Delaware Military Prison and exchanged Oct, 30, 1864. After the war he was a doctor in Texas until shortly before his death in 1918.