On the left of this part of the line, the Union troops having driven back a determined attack of the enemy, the rebels made a rush upon the front, but were fiercely repulsed by two regiments under Colonel Barlow, who followed them through the corn-field and into the orchard beyond. A building called Riper’s house was a strong point here; and Colonel Barlow’s advance gave the Union men possession of it, and they at once occupied it. A section of Robertson’s horse battery now arrived, and in good time, for Richardson’s division up to that juncture had been without artillery; and subsequently Captain Graham, First Artillery, commanding a battery of brass guns, arrived, and taking a position on the crest of the hill, soon silenced the enemy’s guns in the orchard. Heavy firing began immediately; and while directing the firing of Captain Graham’s battery, the gallant Richardson was mortally wounded. The place of General Richardson was supplied by General Hancock. Colonel Bunke, of the Sixty-third New York, commanding General Meagher’s brigade, was ordered to the centre. The battle raged with uninterrupted fury; and on right and left, rebels and Unionists strewed the ground with gory corpses. The groans and cries of the wounded and dying filling up every interval of the battle’s roar. Dark and darker grew the aspect of affairs. The different battle-fields were shut out from each other’s view, but all were visible from a centre hill, from which General McClellan, during the whole day, with his field-glass held to his eyes, watched eagerly and anxiously the fighting of the several brave corps under his command. The afternoon was waning; and things looked very black for the Army of the Union. At three o’clock General McClellan issued an order to General Burnside to push forward his troops with all possible vigor, and carry the enemy’s position on the heights. General Burnside replied that he would advance up the hill as far as he could, before being stopped by a battery, placed directly in his path. Upon hearing this, General McClellan ordered Burnside to flank the battery, storm it, and carry the heights.