2. Map of the river systems from Fort Presque Isle on Lake Erie to the Potomac River, showing French Creek, Allegheny River, the Ohio River between Pittsburgh and Great Beaver Creek, the Monongahela River and the Youghiogeny River Publication/Creation: 1754 Resource Type: Map Access & Availability: Loading
3. Part of a printed map of Chesapeake Bay extending as far north as Philadelphia Publication/Creation: New York? : s.n., 1731? Resource Type: Map Access & Availability: Loading
4. Pennsylvania Publication/Creation: [S.l.] : Maps.com, c2002 Resource Type: Map Access & Availability: Loading
5. Pennsylvania Publication/Creation: [S.l.] : Maps.com, c1999 Resource Type: Map Access & Availability: Loading
6. Pennsylvania Publication/Creation: [S.l.] : Maps.com, c1999 Resource Type: Map Access & Availability: Loading
7. Pennsylvania Author/Creator: United States. Bureau of the Census. Geography Division Publication/Creation: Washington, D.C. : U.S. Dept. of Commerce, Bureau of the Census, [1983] Resource Type: Map Access & Availability: Loading
8. A plan of Pitts Fort at Pitt'sburg Octr. 1759 Author/Creator: Wright, G., active 1759 Publication/Creation: 1759 Resource Type: Map Access & Availability: Loading
9. A plan of Pittsbourough Publication/Creation: 1759? Resource Type: Map Access & Availability: Loading
10. A sketch of the provinces of New York, New Jersey, Pensilvania, Maryland & Virginia shewing the line of forts lately built on the frontiers of those colonies and their situation with respect to the French forts on the Ohio and Lake Erie also the route from Albany to Oswego, with the forts built and to be built for [its?] security Author/Creator: Alexander, William, 1726-1783 Publication/Creation: 1756 Resource Type: Map Access & Availability: Loading