...h the Duke of Marlborough, that though all trials might fail, there was always one way left to get into a fortified city. So evident was it to the Confederates that in both the Yazoo Pass and the Steele's Bayou expedition they had left the northern flank of Vicksburg unprotected, that they removed the depot at once. Not only that, though there was no apparent necessity for it, they went to work to strengt...