Newspaper Clipping Scrapbooks of Frederic Graff Jr.,Chief Engineer of the Philadelphia Water Department: Part 1, 1854-1857
Newspaper Clipping Scrapbooks of Frederick Graff Jr., Chief Engineer of the Philadelphia Water Department. Part 2: 1858-1871
Requiem for a stream: Adams Run in Oak Lane
Cobbs Creek: A Brief Historical Overview by Adam Levine
Visionary planning report for Philadelphia region, 1928
Fairmount Gardens with the Schuylkill Bridge, 1839
Centre Square Engine House, ca. 1807