...he 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 Slocum had constructed opposite Savannah , and broken up his pontoon bridge. He was compelled to look higher up the river for a passage, and marched his troops to Sister's Ferry, or Purysburg. The delay caused by the flood prevented Sloc...