HEADQUARTERS FIRST BRIGADE, FIRST DIVISION,
Camp on Meridian Hill, Washington, July 25, 1861.

Capt. A. BAIRD, Asst. Adjt. Gen.,
Headquarters First Brigade, First Division.

        SIR: In compliance with the orders of Brigadier-General Tyler, I have the honor to report the operations of the First Brigade, First Division, in the action of the 21st instant, at Bull Run, and during the two succeeding days.
        Leaving my camp near Centreville at 2 o'clock a.m., I took my place in the First Division as a reserve. At 9.15 o'clock a.m. at the distance of half a mile from Bull Run, I was ordered by General Tyler to incline the head of my column to the right, and direct it through an open field to a ford about 800 yards above the stone bridge. Before the whole brigade had entered upon the new direction the enemy opened fire from a battery across the run, and threw upon the First and Second Regiments Connecticut Volunteers some twenty-five or thirty rounds of shot and shell, which caused a temporary confusion and wounded several men. Order was shortly restored, and the brigade closed up on Sherman's column before passing the ford.
        After crossing, I marched at once to the high ground, and, by order of General Tyler, came into line on Sherman's left. The order to advance in line of battle was given at about 10 o'clock a.m., and from that hour until 4 p.m. my brigade was in constant activity on the field of battle. The First Regiment Connecticut Volunteers was met by a body of cavalry and infantry, which it repelled, and at several other encounters of different parts of the line the enemy constantly retired before us. At about 2 o'clock p.m. General Tyler ordered me to take a battery on a height in front. The battery was strongly posted, and supported by infantry and riflemen, sheltered by a building, a fence, and a hedge. My order to charge was obeyed with the utmost promptness. Colonel Jameson, of the Second Maine, and Colonel Chatfield, Third Connecticut Volunteers, pressed forward their regiments up the bare slope about one hundred yards, when I ordered them to lie down at a point offering a slight protection and lead. I then ordered them to advance again, which they did, in the face of a movable battery of eight pieces and a large body of infantry, towards the top of a hill. As we moved forward we came under the fire of other large bodies of the enemy, posted behind breastworks, and on reaching the summit of the hill the fire became so hot that an exposure to it of five minutes would have annihilated my whole line. As the enemy had withdrawn to a height beyond, and to the support of additional troops, I ordered the Maine regiment to face by the left flank and move to a wooded slope across an open field, to which point I followed them. The balance of the brigade soon rejoined me, and after a few moments' rest I again put it in motion and moved forward to find another opportunity to charge.
        The enemy had a light battery, which he maneuvered with extraordinary skill, and his shot fell often among and near us. I advanced generally just under the brow of the hills, by a flank movement, until I found myself about half a mile below the stone bridge. Our advance caused the Confederates to retire from the abatis, and enabled Captain Alexander, of the Engineers, to clear it away. In a short time the enemy moved his battery to a point which enabled him to enfilade my whole line; but as he pointed his guns too far to the right, and only improved his aim gradually, I had time to withdraw my brigade by a flank movement around the base of a hill in time to avoid a raking fire.
        At this time a lull in the discharges of our artillery, and an apparent change of position of the enemy's left flank, made me apprehensive that all was not right. I continued my march, and sent my aide, Lieutenant Walter, to the rear to inquire of General McDowell how the day was going. The discontinuance of the firing in our lines becoming more and more apparent, I inclined to the right, and after marching six hundred or seven hundred yards farther, I was met by Lieutenant Upton, aide to General Tyler, and ordered to file to the right, as our troops were retreating. I moved on at an ordinary pace, and fell into the retiring current about one hundred and fifty yards in the rear of General McDowell and staff. Before crossing Bull Run, and until my brigade mingled with the retreating mass, it maintained perfect freedom from panic, and at the moment I received the order to retreat, and for some time afterwards, it was in as good order as in the morning on the road. Half an hour earlier I supposed the victory to be ours.
        The gallantry with which the Second Regiment of Maine Volunteers and the Third Regiment of Connecticut Volunteers charged up the hill upon the enemy's artillery and infantry was never, in my opinion, surpassed. I was with the advancing line, and closely observed the conduct of Colonels Jameson and Chatfield, which merits in this instance, and throughout the day, the highest commendation.
        I also observed throughout the day the gallantry and excellent conduct of Colonel Terry, Second Regiment Connecticut Volunteers, from whom I received most zealous assistance. At one time a portion of his regiment did great execution with their rifles from a point of our line which was thin, and where a few of our men were a little tardy in moving forward.
        Colonel Terry, in his report, calls attention to the coolness, activity, and discretion of Lieutenant-Colonel Young and Major Colburn. The latter, with the adjutant of the regiment, Lieut. Charles L. Russell, showed conspicuous gallantry in defending their regimental colors during the retreat, this side of Bull Run, against a charge of cavalry. Colonel Terry also commends the devotion of Drs. Douglas and Bacon to the wounded while under the hottest fire of artillery. Private Arnold Leech is also highly praised for having spiked three abandoned guns with a ramrod and then bringing away two abandoned muskets.
        Colonel Jameson, of the Second Maine Regiment, gives great credit in his report to Lieut. Col. (C. W. Roberts, Maj. George Varney, and Adjutant Reynolds for their coolness and courage on the field. Sergeant G. W. Brown, of Company F; A. J. Knowles and Leonard Carver, of Company D; A. P. Jones and Henry W. Wheeler, Company A, and Peter Welch, Company I, he mentions for their noble conduct in accompanying him to remove the dead and wounded from the field under a very heavy fire of artillery and musketry. He mentions, also, Captain Foss, Sergeant Samuel Hinckley, of Company A, and Corporal Smart, Company H, for important extra services during the day. He also speaks in high praise of Sergeant W. J. Dean, who was mortally wounded while in the advance of the line, bearing the beautiful stand of colors which was presented the day before on the part of ladies from Maine residing in San Francisco, Cal. Capt. E. N. Jones, of the same regiment, fell mortally wounded while exhibiting great courage in rallying his men to the charge.
        Lieutenant-Colonel Speidel, of the First Regiment Connecticut Volunteers, was set upon by three of the enemy, who undertook to make him a prisoner. The lieutenant-colonel killed one and drove off the other two of his assailants and escaped. I observed the activity of Captains Hawley and Chapman, Adjutant Bacon, and Lieutenant Drake on the field.
        Colonel Chatfield, of the Third Regiment Connecticut Volunteers, gives special credit to Major Warner and Adjutant Duryee for their coolness and energy in assisting to keep the men in line and in urging them forward into action. The men of the Third Regiment brought off in the retreat two of our abandoned guns, one caisson, and several baggage wagons, and behaved with great coolness in the retreat, and the bulk of the regiment was present to repel the charge of cavalry this side of Bull Run.
        I received during the day and on the retreat the most gallant and efficient assistance from Lieutenant Hascall, Fifth U.S. Artillery, A. A. adjutant-general; Lieutenant Walter, First Connecticut Volunteers; Lieutenant Gordon, Second U.S. Cavalry, aides, obeyed my orders on the field with alacrity; and Lieutenant Ely, First Connecticut Volunteers, brigade commissary, assisted me zealously. Lieutenants Walter and Gordon are both missing. The former I sent to the rear at about 4 p.m. to ascertain from General McDowell how the day was going, since which time I have not seen him nor do I know his fate. Lieutenant Gordon was with me two miles this side of Bull Run on the retreat, where I saw him the last time. I trust he will yet be found. My two mounted orderlies, Cooper and Ballou, were both with me until near the end of the conflict, and are both missing. My brigade being far in advance, and the ground very hilly and interspersed with patches of woods, rendered it difficult to avoid being enveloped by the enemy. The last individuals probably missed their way and were killed or captured.
        I have delayed this report of the action until all the wanderers could be gathered in, and the following may therefore be taken as a very close approximation to the actual casualties in my brigade. Those reported missing are supposed to be killed or taken prisoners.
        In addition to the reported loss of the Second Maine Regiment, Lieutenant Skinner, Surgeon Allen and his son, while assisting the wounded, were taken prisoners. The aggregate loss of this gallant regiment was therefore 174 out of 640, which was the complete strength on going into action.
        It was impossible to obtain exact returns of my brigade on the morning of the 21st, but I am certain its aggregate strength was about 2,500 men. We captured fifteen of the enemy and brought six prisoners to Washington.
        In concluding the account of the battle, I am happy to be able to add that the conduct of the First Brigade, First Division, was generally excellent. The troops composing it need only instruction to make them as good as any in the world.
        I take the liberty to add, in continuation of this report, that the Third Connecticut Regiment and a part of the Second Maine Volunteers, of my brigade, left their camps near Centreville at about 10 o'clock a.m. by order of General Tyler, and arrived at Camp McDowell, six and a half miles from the Potomac, at dawn of day the morning after the battle. The camps of my four regiments and that of one company of cavalry were standing, and during the day I learned that the Ohio camp, a mile and a quarter this way, was vacant of troops, and the camp of the New York Second had only a guard of fifty or sixty men left in it. Not wishing the enemy to get possession of so many standing tents and such an abundance of camp equipage, I ordered my brigade to retreat no farther until all the public property should be removed.
        The rain fell in torrents all day the 22d. The men were excessively fatigued, and we had only eleven wagons. Brigade Quartermaster Hodge made two journeys to the city to obtain transportation, but with four or five exceptions the drivers refused to come out. Our eleven wagons were kept in motion, and at nightfall the troops were drenched to the skin and without shelter. So, leaving guards at the regimental camps of my brigade, I moved forward with the bulk of the Third Connecticut Regiment, and by 11 o'clock at night the majority were housed in the Ohio and New York camps.
        We kept good watch through the night, and early in the morning of the 23d instant Quartermaster-General Meigs sent out long trains of wagons, and Brigade Quartermaster Hodge walked six miles to Alexandria and brought up a train of cars, and the work of removal proceeded with vigor. As early as 5.30 o'clock p.m. the last thing of value had been removed and sent forward, to the amount of 175 four-horse wagon loads. The order to fall in was then given, and the brigade marched in perfect order, every man with his firelock, and at sunset bivouacked near Fort Corcoran.
        I acknowledge great indebtedness to Brigade Quartermaster Hodge. But for his untiring exertions in procuring the means of transportation nearly all the public property must have been abandoned. The men of the different regiments labored with extraordinary zeal, considering their great fatigue, and they merit the highest praise. I had given permission to about one hundred sick and lame to limp forward in advance, and about an equal number of cowards and recreants had fled without permission. The balance of my brigade, faithful and laborious, stood by, and they may claim the right to teach that it is unmanly to destroy the public property, and base to abandon it to the enemy, except in cases of the extremest necessity.

I have the honor to be, sir, your most obedient servant,
E. D. KEYES,
Colonel Eleventh Infantry,
Commanding First Brigade, First Division.