Streams, islands, and ferries of early Philadelphia
Fairmount Gardens with the Schuylkill Bridge, 1839
Schuylkill River Hydrographical Survey 1861-66 by H. P. M. Birkinbine
View of Fairmount Water Works, ca. 1827
Maps, etchings, newspaper clippings and other images and documents covering the natural landscape of Philadelphia and surrounding areas throughout more than 300 years of history.