The Eleventh Connecticut now received orders from General Burnside to take the bridge, after the batteries had shelled the woods on the other side, and hold it until General Rodman could march his column over. At about nine o'clock the Sixteenth again formed and marched about a mile, first through a corn-field, and finally into a valley where they halted in an orchard. While passing through the cornfield the men stripped themselves of blankets, overcoats, and all luggage that would impede the progress of marching or the use of firearms. After filling our canteens from a brook near by, we marched up a steep hill that seemed almost impossible to surmount, then down on the other side and into Antietam river, which we forded and marched to a side hill. Soon in plain sight could be seen a rebel battery dashing intrepidly forward and planting itself directly in range of the Sixteenth.

By this time the rebel batteries were all roaring. They opened on us in all their fury. The air was filled with bullets and fiendish missiles. Hundreds of cannon were now aimed at us; grape and cannister, marbles and railroad iron were showered down like rain. The crest of the hill was a great protection to the Sixteenth, and only about a dozen were disabled. A battery was ordered up to engage the enemy, but it was whirled back in less than five minutes, losing every officer, seven men, and five horses. To see those men stand there and be shot down till they received orders to retire was a fearful sight. It was half past three o'clock; the Fourth Rhode Island and the Sixteenth Connecticut were ordered into a cornfield, and they moved forward quite a distance in advance of the army at their right; we here laid down letting the shot and shell pass over us.

In the meanwhile the Division of A.P. Hill, which had arrived from Harper's Ferry, and joined Lee's army, were coming into this cornfield from the opposite side, unobserved; at the same time Company H, (Captain Barber,) had been thrown out in advance as a vidette to prevent being surprised. At four o'clock McClellan sent orders to Burnside to advance, and carry the batteries in his front at all hazards and at any cost. Burnside's corps was charging. General Rodman observed that the rebels were about to flank us and get in our rear, and ordered the Fourth Rhode Island, and Sixteenth Connecticut to swing to the left that we might face them, but at that particular moment the rustling of cornstalks warned us that the rebels were on us. Colonel Beach gave the order 'Attention!' While this order was being executed a terrible volley was fired into us. Volley after volley in quick succession was hurled into our midst. The Sixteenth sprang up and returned the fire with good effect; some fixed bayonets, advanced, and were captured. The most helpless confusion ensued. Our men fell by scores on every side. Still our position was obstinately maintained, until ordered to fall back. The rebels discovered the disorder, and came on us in heavy column.

While we were falling back to cover near the bridge we were swept by a destructive cross-fire, and the rebels becoming entangled in this cross-fire extricated themselves and fell back to the stone wall. The Eighth, Eleventh, and Sixteenth Connecticut, and the Fourth Rhode Island, re-formed and were placed in position for defence. At this time General Burnside's messenger rode up to McClellan. His message was, "I want troops and guns. If you do not send them I cannot hold my position for half an hour." McClellan said slowly: "Tell General Burnside that this is the battle of the war. He must hold his ground till dark at any cost. I will send him Miller's Battery; I can do no more. I have no infantry." Then as the messenger was riding away he called him back. "Tell him if he cannot hold his ground, then the bridge, to the last man! always the bridge! If the bridge is lost, all is lost." The enemy was pressing down hard upon the battery which had been placed on the crest in front of the Eleventh. Burnside called for aid and General Rodman having been killed, Colonel Harland took command of the division, re-formed the disorganized regiments, and by his bravery the unsupported battery was rescued from capture.

The fighting was ended. It was indeed a fearful day for the Sixteenth. Without having time allowed to learn even the rudiments of military science, it was hurried forward and was formed in regimental line almost for the first time on the battle-field of Antietam, the bloodiest day America ever saw. After sunset the brigade was relieved, and retired across the river to reorganize and be ready for the duties which they might be called upon to do when another day should come. Arms were stacked, and the tired soldiers laid down to rest. Of all gloomy nights, this was the saddest we ever experienced. All was quiet and silent as the grave. The stacks of straw which the rebels had fired burned slow and dimly. The cries and groans of the wounded that lay on the battle-field could be heard distinctly, and the occasional report of artillery sounded solemn and death-like.

The morning of the 18th dawned. The sun rose obscurely and there was a fair prospect of rain. The Sixteenth had gone into the battle with 940 men. Some not being able to endure the hard marching had been left at Frederick City. On this morning we could muster but 300 men; but during the day about 200 joined the regiment who wore unable to find it the previous evening. It was a sorry sight that morning as General Burnside rode up to encourage the men, who supposed, of course, that the battle would be resumed, said, "only hold out this day, boys, and the war is ended." Colonel Harland's brigade was once more moved forward, and stationed in line of battle near the bridge, which General Burnside had been ordered to hold at all hazards. Here they remained until the next morning, when the bridge was crossed, and the Sixteenth detached from the brigade to bury their dead, and care for the wounded who were still lying upon the field. The casualties in the Sixteenth were as follows: Lieut. Col. F.W. Cheney wounded in the arm, Maj. Geo. A. Washburn wounded severely in the groin, Captains Manross, Drake, and Brown instantly killed, Captain Barber mortally wounded, dying; about fifteen hours after, Captains Babcock and Hayden wounded, Lieut. William Horton killed, and four lieutenants wounded.

Thirty-eight enlisted men were killed outright. A great many of the men were mortally wounded and died within twenty-four hours after the battle, so that on the 19th, two days after the battle, when the regiment was detailed to bury the dead and pick up the wounded, the recapitulation stood as follows: Killed, 4 captains, 1 lieutenant, and 51 enlisted men; wounded, 2 field officers, 2 captains, 4 lieutenants, and 176 enlisted men; captured, 12 enlisted men and 180 missing, making a total loss of 432 men. For forty-eight hours men were brought in. Parties scoured the fields hunting for the wounded. Many had crept out of the storm of battle and hidden under fences, or among rocks, or in thickets, and their strength failing, they could neither come forth, or make known their situation. Some of the badly wounded did not have any attention for several days. All houses and barns were converted into hospitals, and yards and fields were strewn with straw and the wounded laid, there without shelter. Surgeons worked hard day and night, taking rest only when unable to stand up from weariness. At one of these hospitals about 25 of the Sixteenth were placed. Nothing was to be heard but cries, groans, and entreaties. Here Captain Barber lay in about the center of a barn, quiet, happy, and contented with his lot. The wounded lay around him on every side. He said that he could not live long, and spoke encouraging words to all. Gilbert B. Foster, of Co. A, who died November 13th, was also here. In a room about 12×20 a bloody table stood and around it were five surgeons. A wounded man was laid on the table and it took but a few seconds for them to decide what to do, and but a few minutes to do it. The amputated limbs were thrown out of a window. In forty-eight hours there were as many as two cart loads of amputated legs, feet, arms, and hands in the pile. Plenty of men, most of them slightly wounded, were hard at work carrying the wounded to and fro, making beds of straw, hauling and cutting wood, cooking, feeding, and assisting in a thousand ways.

(On the afternoon of the 18th, a heavy shower, lasting an hour, made it very uncomfortable for those not sheltered.)

"Captain Drake was the most gentlemanly man in the regiment," said Surgeon Mayer. "He was the very soul of courtesy and unaffected dignity of deportment. He always had a quiet care for his men, when they were sick, and was a marked favorite with them, as well as with comrades in the line."

"Capt. Barber was especially noticeable for his religious character, earnest convictions, and high regard for duty. His patriotism was of sterling mould, and he was a brave and intelligent officer."