The soil is of sand and gravel, and very firm. The road back is hard, and at a distance of about four hundred yards from the water begin the gravel hills of the country. The infantry scouts sent out by Colonel Hildebrand found the enemy's cavalry mounted, and watching the Inca road, about two miles back of Eastport. The distance to Inca is only eight miles, and Inca is the nearest point and has the best road by which the Charleston & Memphis Railroad can be reached. I could obtain no certain information as to the strength of the enemy there, but am satisfied that it would have been folly to have attempted it with my command. Our object being to dislodge the enemy from the batteries recently erected near Eastport, and this being attained, I have returned, and report the river to be clear to and beyond Chickasaw. I have the honor to be, your obedient servant, W. T. SHERMAN, Brigadier-General commanding Division. HEADQUARTERS FIFTH DIVISION CAMP SHILOH, April 5, 1862. Captain J. A. RAWLINS, Assistant Adjutant-General, District of Western Tennessee. SIR: I have the honor to report that yesterday, about 3 p.m., the lieutenant commanding and seven men of the advance pickets imprudently advanced from their posts and were captured. I ordered Major Ricker, of the Fifth Ohio Cavalry, to proceed rapidly to the picket-station, ascertain the truth, and act according to circumstances. He reached the station, found the pickets had been captured as reported, and that a company of infantry sent by the brigade commander had gone forward in pursuit of some cavalry. He rapidly advanced some two miles, and found them engaged, charged the enemy, and drove them along the Ridge road, till he met and received three discharges of artillery, when he very properly wheeled under cover, and returned till he met me. As soon as I heard artillery, I advanced with two regiments of infantry, and took position, and remained until the scattered companies of infantry and cavalry had returned. This was after night. I infer that the enemy is in some considerable force at Pea Ridge, that yesterday morning they crossed a brigade of two regiments of infantry, one regiment of cavalry, and one battery of field-artillery, to the ridge on which the Corinth road lies. They halted the infantry and artillery at a point abort five miles in my front, sent a detachment to the lane of General Meeks, on the north of Owl Creek, and the cavalry down toward our camp. This cavalry captured a part of our advance pickets, and afterward engaged the two companies of Colonel Buckland's regiment, as described by him in his report herewith inclosed. Our cavalry drove them back upon their artillery and Infantry, killing many, and bringing off ten prisoners, all of the First Alabama Cavalry, whom I send to you.