The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 7: Prisons and Hospitals.
Francis Trevelyan Miller, Ed.

Hospital boats.

These two photographs show boats used for transporting the sick and wounded in the West and in the East. The hospital steamer Red Rorer, shown in the upper picture, plied the Mississippi, while the steamer Argo and the schooner lying at her bow are two of the vessels that were used in bringing medical supplies to the Army of the Potomac in its operations near Petersburg. All transport boats were at first under control of the quartermaster's department, but later a number were placed under the exclusive control of the medical officers. These varied in type from the finest freight boats to the best types of speedy steamers.

United States hospital boat red rover at Vicksburg

Hospital wharf on the Appomattox river, near City Point