


Birch’s Views of Philadelphia, 1800

Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)

From Creek To Sewer

The Water and Drainage History of Philadelphia: A seven-part course

The Water and Drainage History of Philadelphia, Part 6

The Water and Drainage History of Philadelphia, Part 5

The Water and Drainage History of Philadelphia, Part 4

The Water and Drainage History of Philadelphia, Part 3
