
Lycoming Creek and the Pennsylvania railroad corridor define the geography of this 1920s survey, where industrial legacy and mountain settlement intersect. Evidence of early manufacturing is found at Nail Factory Mtn and the nearby Falls Factory School, while the valley floor is dotted with small agricultural and milling centers like Balls Mills and Hepburnville. The rugged highlands are organized around family-named peaks and ridges such as Cochran Mtn and Hanlon Mtn, interspersed with a high density of one-room schoolhouses like Steam Mill School and Limber Bridge School. Near the southern edge, the growth of Williamsport begins to touch the rural landscape at Garden View and the expansive Wildwood Cemetery, marking the transition from the wilder reaches of Laurel Mtn to the urban center of the county seat.
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1921 · Williamsport
USGS Topo · 1:48,000
1921 · Lock Haven
USGS Topo · 1:62,500
1923 · Lock Haven
USGS Topo · 1:62,500
1923 · Trout Run
USGS Topo · 1:62,500
1923 · Williamsport
USGS Topo · 1:62,500
1924 · Milton
USGS Topo · 1:62,500
1925 · Blossburg
USGS Topo · 1:62,500
1927 · Blossburg
USGS Topo · 1:62,500
1930 · Warrensville
USGS Topo · 1:62,500
1934 · Warrensville
USGS Topo · 1:62,500