Statistics for occurrence #1 of “The Potomac” in chapter 1.27 of Jefferson Davis, The Rise and Fall of the Confederate Government:

...en near Fairfield, which was easily checked. The army, after a tedious march rendered more difficult by the rains, reached Hagerstown on the afternoon of the 6th and morning of the 7th of July. The Potomac was so much swollen by the rains that had fallen almost incessantly since our army entered Maryland, as to be unfordable. A pontoon train had been sent from Richmond, but the rise in the river gave...
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