the enemy attacked my advanced picket on the Richmond road. They took advantage of the dense fog, and approached very near before being in disorder. They left a wounded prisoner on the ground, who states that their force consisted of 300 men, of the Twenty-third North Carolina Regiment. We lost 1 officer and 1 private killed, an 2 enlisted men wounded. The officer killed (Major John E. Kelley, of the Ninety-sixth New York Volunteers, who commanded the pickets) is a great loss to the service. I knew him well when orderly-sergeant of the Second Infantry. I have inclosed a list of the killed and wounded. Captain George W. Gillespie, of the One hundred and third Pennsylvania Volunteers, who commanded the pickets after the death of Major Kelley, behaved very well.

Very respectfully, your obedient servant,

SILAS CASEY

Brigadier-General, Commanding Division

Captain C. C. SUYDAN, Asst. Ajdt. General, Fourth Army Corps.

MAY 31-JUNE 1, 1862.-Battle of Fair Oaks, or Seven Pines, Va.

REPORTS, ETC.

No. 1.-Major General George B. McClellan, U. S. Army, commanding Army of the Potomac, and resulting correspondence.

No. 2.-Return of Casualties in the Army of the Potomac.

No. 3.-Brigadier General Edwin V. Sumner, U. S. Army, commanding Second Corps.

No. 4.-Brigadier General Israel B. Richardson, U. S. Army, commanding First Division.

No. 5.-Captain George W. Hazzard, Chief of Artillery.

No. 6.-Brigadier General Oliver O. Howard, U. S. Army,commanding First Brigade.

No. 7.-Colonel Thomas J. Parker, Sixty-fourth New York Infantry, commanding First Brigade.

No. 8.-Colonel Edward E. Cross, Fifth New Hampshire Infantry.

No. 9.-Colonel Francis C. Barlow, Sixty-first New York Infantry.

No. 10.-Colonel Thomas J. Parker, Sixty-fourth New York Infantry.

No. 11.-Lieutenant Colonel Charles F. Johnson, Eighty-first Pennsylvania Infantry.

No. 12.-Brigadier General Thomas F. Meagher, U. S. Army, commanding Second Brigade.

No. 13.-Colonel John Burke, Sixty-third New York Infantry.

No. 14.-Colonel Robert Nugent, Sixty-ninth New York Infantry.

No. 15.-Lieutenant Colonel Patrick Kelly, Eighty-eighth New York Infantry. No. 16.-Brigadier General William H. French, U. S. Army, commanding Third Brigade.

No. 17.-Colonel Paul Frank, Fifty-second New York Infantry.

No. 18.-Colonel Samuel K. Zook, Fifty-seventh New York Infantry.

No. 19.-Colonel Joseph C. Pinckney, Sixty-sixth New York Infantry.

No. 20.-Colonel John R. Brooke, Fifty-third Pennsylvania Infantry.

No. 21.-Brigadier General John Sedgwick, U. S. Army, commanding Second Division.

No. 22.-Colonel Charles H. Tompkins, Chief of Artillery.

No. 23.-Lieutenant Edmund Kirby, Battery I, First U. S. Artillery.

No. 24.-Captain John A. Tompkins, Battery A, First Rhode Island Light Artillery.

No. 25.-Captain Walter O. Bartlett, Battery B, First Rhode Island Light Artillery.

No. 26.-Captain Charles D. Owen, Battery G, First Rhode Island Light Artillery.

No. 27.-Brigadier General Willis A. Gorman, U. S. Army, commanding First Brigade.

No. 28.-Lieutenant Colonel John W. Kimball, Fifteenth Massachusetts Infantry.

No. 29.-Colonel Alfred Sully, First Minnesota Infantry.

No. 30.-Colonel James A. Suiter, Thirty-fourth New York Infantry.