...n, with the Sixteenth army corps, under the command of Major-General Hurlbut, and the Seventeenth army corps, commanded by General McPherson, left Vicksburgh upon an expedition through Mississippi.--( Doc . 122.) The guard of one company of infantry posted at Patterson Creek Bridge, eight miles east of Cumberland, Va., was attacked at half-past 1 P. M. yesterday, by five hundred rebel cavalry, un...