rendered efficient service during the march from Hanover Court-House to the Chickahominy, it being the rear company. All of which is respectfully submitted. WILL. T. MARTIN, Lieutenant- Colonel, (Jo mmanding Jeff. Davis Legmon. Capt. J. T. XV. HAIRSTON, A. A. G., Hdqrs. Cavalry Brigade. JUNE 15, 1862.Reconnaissance to vicinity of New Market, Va. Report of Brig. Gen. Silas Casey, U. S. Army. commanding Third Division, Fourth Corps. HEADQUARTERS CASEYS DIVISION, June 16, 1862. CAPTAIN: I have the honor to report that yesterday a cavalry de. tachment ordered by me on a reconnaissance encountered near New Market a rebel picket of about 12 mounted men. They succeeded in capturing 1 of their horses and 2 carbines. They also brought in a man named Nathan Doughty, who has been engaged in collecting negroes to work on the fortifications near Richmond. I would respect- fully call attention to the insecurity of this part of the line. My geii- eral officers of the day report a number of fording places not heretofore known to us. In fact, in dry weather the places across the swamp that cannot be easily forded are exceptions. A sufficient force of cavalry should be kept here, that the borders of the swamp from the Chicka- hominy may be constantly watched. I also request that an officer of engineers may be sent to make an examination of the swamp. Very respectfully, your obedient servant, SILAS CASEY, Brigadier- General Volunteers, Commanding Division. Capt. C. C. SUYDAM, Asst. Adjt. Gen., Fourth Corps. JUNE 15, 1862.Skirmish near Seven Pines, Va. REPORTS. No. 1.Brig. Gen. Jose ph Hooker, U. S. Army, commanding Second Division, Third Corps. No. 2.Brig. Gen. Daniel E. Sickles, U. S. Army, commanding Second Brigade. No. 3.Maj. John D. Moriarty, Seventy-third New York Infantry. No. 4.Col. Robert Nugent, Sixty-ninth New York Infantry. No. 5.Brig. Gen. Roswell S. Ripley, C. S. Army, commanding Fifth Brigade, D. H. Hills division. No. 1. Report of Brig. Gen. Joseph Hooker~ U. S. Army, commanding Second Division, Thmrd Corps. HEADQUARTERS HOOKERS DIVISION, THIRD CORPS, Camp, near Fair Oaks Station, Va., June 16, 1862. CAPTAIN: As the affair between the pickets yesterday appears to have been much more disastrous than was reported to me last night,