The US Army General Hospital at Central Park, New York City was the largest NY hospital; Architect William Law Olmsted resided there while building Central Park. An Original Letter from Chief Surgeon John WS Gouley, with US Army Hospital Central Park letterhead, Oct 17, 1863 to the Commander of I Company, 64th New York Volunteers, requesting the pay account for patient Sergeant William Spaker of the 64th NY. 1p 8 x 11″ ptd/ink, single sheet letter with reverse stamped & addressed. W service info- Sergeant Spaker was wounded July 2 at the Wheat Field during Picketts Charge, Gettysburg, his leg amputated. Folds, age spots, edge wear, Overall VG.