... headquarters Department of the Tennessee, before Vicksburg, March 16, 1863. Major-General W. T. Sherman, commanding Fifteenth Army Corps. General: You will proceed as early as practicable up Steele's Bayou , and through Black Bayou to Deer Creek, and thence with the gunboats now there by any route they may take to get into the Yazoo River, for the purpose of determining the feasibility of getting an arm...