Map Lovers’ Monday: Two views of the Union Canal in central Pennsylvania
Map Lovers’ Monday: Philadelphia in 1957, according to the Pennsy
Schuylkill Navigation: Celebrating 200 years
Water History: Rebirth of the Rivers
Map Lovers’ Monday: New Jersey 1869
Map Lovers’ Monday: More is not necessarily better.
Map Lovers’ Monday: Topography of Philadelphia from 1863
Map Lover’s Monday: Looking for Cleaner Water
Schuylkill River watershed, population in 1904
Map Lovers’ Monday: Schuylkill River from Wissahickon Creek to Norristown, 1913
