Monongahela
Oldest settlement in the valley and transportation center since the days of Devore's Ferry, chartered 1775. Laid out in 1796 as Williamsport. A city since 1873. Here thousands of pioneers began the river journey to the West.
David Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesBarry Lawrence Ruderman Map Collection, Stanford LibrariesDigital Commonwealth, Boston Public Library
Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov
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