(without ammunition) of the Sixth Ohio and First Pennsylvania Cavalry the enemy was prevented from crossing their infantry over Kettle Run to the left rear of the position occupied by the Second Corps d'Armee. Marched to Brentsville same night.

October 15.-Crossed Bull Run early, but returned to re-enforce General Buford. Moved to near Fairfax Station same night and t Wolf Run Shoals.

October 16.-Picketed Occoquan River until the 18th.

October 18.-Marched to Fairfax Station.

October 19.-Marched to Centreville.

October 20.-Marched to Bull Run.

October 21.-Marched to Warrenton.

October 22.-Marched to near Sulphur Springs.

Respectfully submitted.

J. P. TAYLOR,

Colonel, Commanding Brigade.

Captain H. W. WEIR,

Assistant Adjutant-General.

[Inclosure.]

List of Casualties in the First Brigade, Second Division, Cavalry Corps, during the engagements at Sulphur Springs, Auburn, Bristoe Station, and near Bull Run, October 12, 14, 15 and 16, 1863.

Officers.

Command. Killed. Wounded. Missing.

Commanding officer ... ... ...

and staff.

1st Rhode Island ... ... ...

Cavalry.

1st Maryland ... .... ...

Cavalry.

1st New Jersey 1 3 ...

Cavalry.

1st Pennsylvania ... ... ...

Cavalry.

1st Massachusetts ... ... ...

Cavalry.

3rd Pennsylvania 1 ... ...

Cavalry.

6th Ohio Cavalry. ... 3 ...

Total a. 2 6 ...

Enlisted men.

Command. Killed. Wounded. Missing. Total.

Commanding officer ... .. ... ...

and staff.

1st Rhode Island 1 5 45 51

Cavalry.

1st Maryland ... 4 14 18

Cavalry.

1st New Jersey 2 17 7 30

Cavalry.

1st Pennsylvania 2 10 ... 12

Cavalry.

1st Massachusetts ... 6 2 8

Cavalry.

3rd Pennsylvania 2 8 6 17

Cavalry.

6th Ohio Cavalry. 2 5 2 12

Total a. 9 55 76 148

RECAPITULATION.

Casualties. Officers. Enlisted men. Total.

Killed. 2 9 11

Wounded. 6 55 61

Missing. ... 76 76

Total. 8 140 148

a See p. 359.