...s the course of an old river bed, the half toward Snyder's being impassable swamp and the half next Vicksburg a narrow lake opening into the Mississippi near the city and connecting on the north with Chickasaw Bayou , which runs thence due north to the Yazoo. Sherman landed Steele's division beyond the bayou, and the remainder of his army on the island of low land cut off by the lake and bayou from the Confeder...