Requiem for a stream: A brief history of Dobson’s Run
Drawing Dock Creek
Down Under, Part 2: Beaver Creek as it appears today
Bottled vs. Tap in 1906
Overbrook, as it was. A brief history of the Overbrook neighborhood of Philadelphia, focusing on changes in the natural landscape.
Newspaper Clipping Scrapbooks of Frederick Graff Jr., Chief Engineer of the Philadelphia Water Department. Part 2: 1858-1871
Cobbs Creek in the Days of the Old Powder Mill
1826 Report of the Committee of Delaware County on the subject of Manufactories, Unimproved Mill Seats, etc. in said county.
1882 Report from the Army Corps of Engineers on Navigation in Frankford Creek, Philadelphia
Typhoid Fever and sewage tainted drinking water: An 1889 report from the Philadelphia Board of Health
