It was about ten o’clock in the morning when the enemy made his first appearance, attracting the attention of the Union troops by light skirmishing and occasional artillery as far to the right as General Hooker’s division. It was an hour of deep anxiety to the Union troops, and the heart of every man beat eagerly and anxiously, but fearlessly, when, at two o’clock in the afternoon a large body of rebels was seen approaching directly in front of Heintzelman’s corps, but beyond the reach of our guns. The preparations made at once to meet its advance proved unnecessary, for it disappeared; and it was generally supposed that it retired by the rear, and, later in the day, participated in the attack made on our left. About three o’clock the battle began in earnest; a heavy fire of artillery was poured in on Kearney’s left and Couch’s division, which was speedily followed up by a sharp attack of infantry on Couch’s front. The heroic Unionists were prompt to answer, and a roar of artillery replied to that of the enemy. The infantry of Couch’s division remained lying on the ground till the advancing column of rebels was within short musket range, and then, springing to their feet, sent a death-dealing volley into their ranks, that broke the attacking force and drove them in disorder back over their own ground. The Union army availed themselves of the opportunity by following up the advantage; and they pursued the enemy till the right of its line had advanced some seven or eight hundred yards, and rested upon a thick clump of trees that gave them a stronger and more effective position. The whole line was now carefully surveyed during the lull of a few minutes that followed, while the Union soldiers waited eagerly for the next attack. The rebels now gathered their utmost strength to strike their heaviest blow. At six o’clock they suddenly opened a destructive fire upon Couch’s and Richardson’s divisions; and at the same time followed column after column of infantry from the woods, charging desperately, and evidently intending to take the field. General McClellan’s report, in describing this part of the battle is as follows: “Brigade after brigade, formed under cover of the woods, started at a run to cross the open space and charge our batteries, but the heavy fire of our guns, with the cool and steady volleys of our infantry, in every case sent them reeling back to shelter, and covered the ground with their dead and wounded. In several instances our infantry withheld their fire until the attacking column, which rushed through the storm of canister and shell from our artillery, had reached within a few yards of our lines. They then poured in a single volley, and dashed forward with the bayonet, capturing prisoners and colors, and driving the routed columns in confusion from the field.”