Pennypack Park Map
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Mount Moriah Historic Cemetery and Arboretum
The ecology of Center City, Philadelphia (in case you didn’t know there was any)
Smith’s and Windmill Islands
High Water: Flooding in Philadelphia
Visionary planning report for Philadelphia region, 1928
The Water and Drainage History of Philadelphia: A seven-part course
Fairmount Gardens with the Schuylkill Bridge, 1839
State House Garden, Philadelphia, 1800