Map Lovers’ Monday: Topography of Philadelphia from 1863
Map Lovers’ Monday: Schuylkill River from Wissahickon Creek to Norristown, 1913
Map Lover’s Monday: Fairmount Park, 1869
Fairmount Park topographical map, showing East Park Reservoir, 1872
Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)
Early photographs of Fairmount and vicinity, 1848
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.