skirmishers also, in falling back, had several of their wounded bayoneted, by order of one the enemy's officers.

The enemy's entrenchments and batteries appeared to be in rear of a creek called Bull run. The batteries on the extreme right of their line were on high ground,a nd fired over the heads of their infantry in front. At night we fell back to Centreville for water and rations, and this morning have again occupied our ground upon the hill in front of the enemy, they being in large force, and having their pickets and skirmishers in the woods and in front of them, as yesterday. I have the honor also to inclose a statement of our loss incident to this affair.

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

I. B. RICHARDSON,

Colonel, Commanding Fourth Brigade, First Division.

[Inclosure.]

Casualties at Blackburn's Ford.

Killed. Wounded.

Command. Offi- Enlisted Offi- Enlisted

cers. men. cers. men.

Ayres' battery. ... 2 1 1

Brackett's squadron. ... ... ... 3

Light battalion. ... 2 ... 4

First Massachusetts Infantry. 1 9 ... 8

Second Michigan Infantry. ... ... ... 1

Third Michigan Infantry. ... ... ... 1

Twelfth New York Infantry. ... 5 ... 19

Total. 1 18 1 37

Missing.

Command. Offi- Enlisted Aggregate.

cers. men.

Ayres' battery. ... ... 4

Brackett's squadron. ... ... 3

Light battalion. ... 2 8

First Massachusetts Infantry. ... 14 32

Second Michigan Infantry. ... ... 1

Third Michigan Infantry. ... ... 1

Twelfth New York Infantry. ... 10 34

Total. ... 26 83

Numbers 5. Organization of the Army commanded by Brigadier General Irvin McDowell at the battle of Bull Run, Va., July 21, 1861.

[Compiled from the records of the Adjutant-General's Office.]

FIRST DIVISION.

Brigadier General DANIEL TYLER.

First Brigade.

Colonel E. D. KEYES.

Second Maine.

First Connecticut.

Second Connecticut.

Third Connecticut.

Second Brigade.

Second New York.

First Ohio.

Second Ohio.

E, Second U. S. Artillery.

Third Brigade.

Colonel W. T. SHERMAN.

Thirteenth New York.

Sixty-ninth New York.

Seventy-ninth New York.

Second Wisconsin.

E, Third U. S. Artillery.

Fourth Brigade.

Colonel I. B. RICHARDSON.

First Massachusetts.

Twelfth New York.

Second Michigan.

Third Michigan.

G, First U. S. Artillery.

M, Second U. S. Artillery.