John, maybe this will help.

KELLEY, THOS. LAFAYETTE, Assistant Surgeon. May 31, '63, 4th
Georgia Cavalry

Source:
ROSTER OF THE MEDICAL OFFICERS OF THE ARMY OF TENNESSEE.

During the Civil War Between the Northern and Southern
States, 1861-1865. Consolidated from the Original Medical-
Director's Records.

By JOSEPH JONES, M. D., LL. D.

Surgeon-General of the United Confederate Veterans.