You would not have wanted to drink it: Philadelphia’s water supply in 1884
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Map Lovers’ Monday: 1896 Suburban Transportation Map
Ghosts of Water in Fairmount Park, Part II, with Adam Levine
Mount Moriah Historic Cemetery and Arboretum
Map Lovers’ Monday: 1891 Water Supply Plan
Plan of Philadelphia, John Hills, 1796
Wingohocking Sewer across Penn St.
Map of Frankford Borough, 1845
Philadelphia Navy Yard, July 1872
