Warren Co. oil territory.

1865

F.W. Beers & Co.

1:63k

Tidioute, Pennsylvania.

1878

Odbert, A.

1:4k

Howe's Map Of The Oil District Of Pennsylvania.

1866

Howe, Henry G.

1:32k

Warren County, Pennsylvania, By Andrew H. Ludlow, 1838.

1838

Ludlow, Andrew H.

Map of the Oil Region of Pennsylvania.

1865

Townsend & Dale

1:158k

Allegheny River.

1865

F.W. Beers & Co.

1:36k

Warren, McKean, Potter, Forest, Elk, Cameron counties.

1872

Gray, Ormando Willis; Walling, H. F.

1:300k

Harmony, Hickory, Kingsley, Tionesta townships.

1865

F.W. Beers & Co.

1:63k

Erie, Crawford, Venango counties.

1872

Gray, Ormando Willis; Walling, H. F.

1:300k

Pennsylvania (western part).

1948

Hammond, C.S.

1:585k