Collection search - A Sketch of the Province 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 Routs from Albany to Oswego, with the Forts built and to be built for its security. Drawn by Order of His Excellency General Shirley, by William Alexander Secy & Copy'd by Mr. Bartman. [cartographic material]