General Alfred N. Duffie's report:

HDQRS. SECOND CAVALRY DIVISION, CAVALRY CORPS,
June 12, 1863.

CAPTAIN: In compliance with yours of this date, I have the honor to report that on the 8th instant I received orders from the general commanding the Second and Third Cavalry Divisions to move with my (Second) cavalry division in the afternoon of the same day to Morrisville, proceeding by the Elk Run road. This place was reached by my command at 7 o'clock in the evening, where I encamped.

At 12.15 a.m. I received a verbal order from a staff officer from headquarters of the Second and Third Cavalry Divisions, to move my command to Kelly's Ford, and to report in person to the general commanding. After my communication with the general, my orders were to cross the ford at once, leaving my wagon train and pack-mules at Mount Holly Church.

After the crossing of the ford by my whole command, I established my line of battle on the Stevensburg road, near the ford, the First Rhode Island and Sixth Ohio Cavalry on the right, the First Massachusetts on the left, a section of my battery in the center, the Third Pennsylvania Cavalry forming the reserve and supporting the balance of the artillery, taking care to protect well my flanks. I moved in this order on the road leading to Stevensburg and crossing Mountain Run. At this place I sent one battalion of the Sixth Ohio to proceed immediately and as rapidly as possible to Stevensburg. This battalion entered the place without meeting the enemy.

At 8.30 a.m. I was informed by a dispatch from Major Stanhope, commanding the battalion, that he was in Stevensburg, and that the enemy was in sight, skirmishing toward the town. I sent orders to him to hold the place at all hazards, and, in case of his being pushed too hard, to retreat slowly. A few minutes afterward a dispatch from him informed me that he could not hold the place, as the enemy were approaching in force.

One and a half miles from Stevensburg I met the battalion retreating, its skirmishers closely engaged with the enemy. I immediately threw forward the skirmishers of the First Massachusetts, First Rhode Island, and Sixth Ohio Cavalry, who immediately became engaged with the enemy, who were strongly posted and partly concealed in the woods. Pushing steadily forward, the enemy were quickly dislodged from the dense woods into open fields, where the First Rhode Island Cavalry was ordered to charge on the right, the First Massachusetts on the left, and one squadron of the Sixth Ohio Cavalry on the road, in order to cut off the retreat of the enemy on his flank and check him in his front. By this movement I succeeded in cutting into two parts the Fourth Virginia Cavalry, commanded by Colonel [Williams C.] Wickham, who escaped with half of his command through the woods on my right. In this charge I captured 1 officer and 57 men.

My command was then reformed, and I moved forward and took position on an elevation at one end of the town, which commanded the road to Culpeper, and also that leading to Brandy Station, on which, about half a mile from Stevensburg, the enemy reformed his line of battle. I succeeded, by the admirable manner in which Lieutenants Pennington and Clarke managed their guns, in forcing them to abandon this line. The First Massachusetts Cavalry were then thrown forward for the purpose of charging, when I received orders from the general commanding Second and Third Divisions, by a staff officer, to return and join the Third Division, on the road to Brandy Station.

I then withdrew my command, leaving the Third Pennsylvania Cavalry, commanded by Col. J. Irvin Gregg, and one section of my battery to form the rear guard, and retired on the same road by which I had advanced, the enemy following my movements with two regiments of cavalry and one piece of artillery.

On approaching the road leading from the Stevensburg road to Brandy Station, I found one squadron of the Tenth New York Cavalry, moved up with pack-mules, fleeing in the greatest disorder toward the Stevensburg road. Upon inquiring the cause, I was informed that the flank had been charged by a party of the enemy, and been thrown into the greatest confusion. This detained me for a half hour.

I then moved forward by that road (capturing several of the enemy) to join General Gregg, who ordered me upon arriving to halt my command and relieve the batteries of the First and Third Cavalry Divisions, and cover the retreat of the Cavalry Corps.

All the cavalry having left the ground at this point, I moved on the road leading to Beverly Ford the evening following, with two regiments and one gun, at a proper distance. Upon my arrival near Beverly Ford, General Pleasonton directed me to move with one brigade to support General Buford, and send the Second Brigade on the road leading to Rappahannock Ford, to cover the crossing of the Third Division. My command crossed Beverly Ford at about 5 p.m., and was then ordered to join General Gregg at Rappahannock Station, which I did.

The regiments which were engaged are as follows: The First Massachusetts, First Rhode Island, Sixth Ohio, and Third Pennsylvania Cavalry, and Battery M (Pennington's), Second U.S. Artillery. The force engaged from this division numbered 1,600 cavalry and one battery of artillery, six guns.

I have the honor to be, very respectfully, your obedient servant,

 A. N. DUFFIÉ,

 Colonel, Comdg. Second Cavalry Division.

 Capt. A. J. COHEN,

Assistant Adjutant-General.