Statistics for occurrence #1 of “Lancaster, Pa.” in entry united-states-of-america-ohio of Harper's Encyclopedia of United States History:

...lish government to occupy the valley of the Ohio......1709 Vaudreuil, governor of Canada, opens a trading route to the Mississippi by Lake Erie, the Maumee and Ohio rivers......1720 Treaty of Lancaster, Pa. : territory beyond the mountains ceded by the Iroquois to the English......June, 1744 Virginia colonists form the Ohio Company for occupation and settlement of the Ohio Valley......1748 Celer...
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