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
Map Lovers’ Monday: 1891 Water Supply Plan
Plan of Philadelphia, John Hills, 1796
Photos from the Philadelphia Anglers’ Club
Down Under III: A walk in the Dobson’s Run Storm Relief Sewer, June 15, 2010
Requiem for a stream: A brief history of Dobson’s Run
Down Under, Part 2: Beaver Creek as it appears today
Overbrook, as it was. A brief history of the Overbrook neighborhood of Philadelphia, focusing on changes in the natural landscape.