The French and Indians, the Number of each not known, had, as we found after, possessed the Sides and Brow of a Hill, in a circular Form, from the Extreme of which some of them fired upon one of our advanced Flank Parties. This immediately struck a general Pannic; the Men could not be persuaded to form regularly; in great Confusion they fell back. . . . [N]o Order could be restored.

According to this account, what happened in the battle?