Wissahickon Creek near the Paper Mill Bridge (Picturesque America)
Drive along the Wissahickon Creek Vallley (Picturesque America)
You would not have wanted to drink it: Philadelphia’s water supply in 1884
Plans and maps of the Pennypack Creek Watershed in Philadelphia
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
