Jarvis U.S. General Hospital, Baltimore, Md

“Initially a sick or wounded soldier would be treated by his regimental surgeon and/or in a field hospital. If his condition was likely to be of short duration or too grave for him to be moved, he would remain in the field hospital; otherwise he would be sent to a general hospital for further treatment and convalescence.”
Glenna R. Schroeder-Lein. The Encyclopedia of Civil War Medicine (Armonk, New York: M.E. Sharpe, 2008) pages 153-154.