Down Under, Part 2: Beaver Creek as it appears today
Stormwater Songs by John and Jan Haigis
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.
Typhoid Fever and sewage tainted drinking water: An 1889 report from the Philadelphia Board of Health
Lighthouses along the Delaware, 1913
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Visionary planning report for Philadelphia region, 1928
Schuylkill Navigation Company Scrapbook
Dauphin and Sydenham car crash, Jan. 17, 1978
