...way, where it had made a lodgment by the day above named, and from that point seriously menaced Charleston. The left wing, under Slocum, accompanied by Kilpatrick's cavalry, was to have crossed the Savannah River on a pontoon bridge laid at the city; but incessant rains, which flooded the country, swelled the streams and overflowed the swamps on their margins, had caused the submergence of a causeway which Sl...