Goops! My error, a "ward" was a sub-division of a Hospital "Division".
From the Richmond Enquirer, 6/19/1862, p. 1, c. 6
WANTED – INFORMATION – A young soldier who was wounded in the late battle, and is now in Ward No. 78, 4th Division, Winder Hospital, desires to hear from his aunt, now supposed to be in Richmond. His aunt’s name is Mrs. Frank Tucker. His name is G. H. Eley, of 53d Va. Regiment, and from Williamsburg, Va.
June 19 – 6t.