In pursuance of the fatal mistake made by dispersing Halleck’s forces after the fall of Corinth, General Don Carlos Buell’s Army of the Ohio had been started some time before on its march eastward toward Chattanooga; and as this movement would be followed of course by a manoeuvre on the part of the enemy, now at Tupelo under General Braxton Bragg, either to meet Buell or frustrate his designs by some counter-operation, I was expected to furnish, by scouting and all other means available, information as to what was going on within the Confederate lines. To do the work required, necessitated an increase of my command, and the Seventh Kansas Cavalry was therefore added to it, and my picket-line extended so as to cover from Jacinto southwesterly to a point midway between Rienzi and Booneville, and then northwesterly to the Hatchie River. Skirmishes between outposts on this line were of frequent occurrence, with small results to either side, but they were somewhat annoying, particularly in the direction of Ripley, where the enemy maintained a considerable outpost. Deciding to cripple if not capture this outpost, on the evening of July 27, I sent out an expedition under Colonel Hatch, which drove the enemy from the town of Ripley and took a few prisoners, but the most valuable prize was in the shape of a package of thirty-two private letters, the partial reading of which disclosed to me the positive transfer from Mississippi of most of Bragg’s army, for the purpose of counteracting Buell’s operations in northern Alabama and East Tennessee. This decisive evidence was of the utmost importance, and without taking time to read all the letters, I forwarded them to General Granger July 28, in a despatch which stated: “I deem it necessary to send them at once; the enemy is moving in large force on Chattanooga.” Other than this the results of the expedition were few; and the enemy, having fled from Ripley with but slight resistance, accompanied by almost all the inhabitants, re-occupied the place next day after our people had quitted it, and resumed in due time his annoying attacks on our outposts, both sides trying to achieve something whenever occasion offered.