Statistics for occurrence #1 of “Gen. Irvin McDowell” in entry state-of-virginia of Harper's Encyclopedia of United States History:

...r the passage of the Potomac at three points—one column to cross the Aqueduct Bridge at Georgetown; another at the Long Bridge, at Washington, and a third to proceed in vessels to Alexandria. Gen. Irvin McDowell led the column across the Aqueduct Bridge, in the light of a full moon, and took possession of Arlington Heights. At the same time the second column was crossing the Long Bridge, 2 miles below, and...
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