High Water: An Informal History of Flooding in Philadelphia
Map Lovers’ Monday: Water for City Hall
Old News: Two unusual underground rescues
Water History: Rebirth of the Rivers
Play Ball! Meet the 1960 PWD Softball Team
Birch’s Views of Philadelphia, 1800
Pennypack Park Map
Coal Depot, Richmond, on the Delaware (Picturesque America)
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Map Lovers’ Monday: 1896 Suburban Transportation Map
