Statistics for occurrence #1 of “Ohio river” in chapter 16 of George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 7, 4th edition.:

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The governor of Virginia Nullifies the Quebec act. The attempt to extend the jurisdiction of Quebec to the Ohio river had no sanction in English history, and was resisted by the older colonies, especially by Virginia. The interest of the crown offices in the adjacent provinces was also at variance with the policy ...
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