Pennsylvania Hospital Drawn, Engraved & Published by W. Birch & Son in 1799
Peter Kalm wrote of New York City, "In addition to the hospital...there is another farther up Broadway... There is a yard where patients are allowed to walk, and plans call for planting trees in it." The hospital in Philadelphia also had a walled yard planted with trees and criss crossed with walks for its patients and their visitors to walk in.
1814 John G. Exilious. South East View of the Pennsylvania Hospital. Engraving. C.P. Harrison, printer.
1817 William Strickland (1787-1854). The South Front of the Philadelphia Hospital with Brick-Walled Yards
1840 View of the Pennsylvania Hospital Wild, J. C. (John Caspar), ca. 1804-1846, artist.