The pipe beneath the rocky path
Map Lovers’ Monday: New Jersey 1869
Map Lovers’ Monday: Topography of Philadelphia from 1863
Map Lovers’ Monday: Schuylkill River from Wissahickon Creek to Norristown, 1913
Sandy Run Watershed and the Holmesburg Water Works
Map Lover’s Monday: Fairmount Park, 1869
Roberts Mill, Wingohocking Creek, 1871
Fairmount Park topographical map, showing East Park Reservoir, 1872
Dripps map of Frankford and vicinity, 1849
Plans and maps of the Pennypack Creek Watershed in Philadelphia