Map shows "Lines east of Pittsburgh and Erie" and "Lines west of Pittsburgh and Erie". Inset map shows ferry routes on Chesapeake Bay. Route lines shown in color. Submap: Chesapeake Bay. Prime meridian: GM. Relief: no. Graphic Scale: Miles. Projection: Cylindrical. Printing Process: Lithography.
Extent
1 map ; printed col. ; 26 x 78 cm., sheet 30 x 81 cm.
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