But they ran--here as in Prentiss's Division, of which last more in a moment--and the enemy did not fail to profit by the wild disorder. As Hildebrand's Brigade fell back, McClernand threw forward his left to support it. Meanwhile Sherman was doing his best to rally his troops. Dashing along the lines, encouraging them everywhere by his presence, and exposing his own life with the same freedom with which he demanded their offer of theirs, he did much to save the division from utter destruction. Buckland and McDowell held their ground fiercely for a time. At last they were compelled to retire their brigades from their camps across the little ravine behind; but here again they made a gallant defence, while what was left of Hildebrand's was falling back in such order as it might, and leaving McClernand's left to take their place, and check the wave of Rebel advance. Prentiss was faring scarcely so well. Most of his troops stood their ground, to be formed into line, but strangely enough, the line was drawn up in an open space, leaving to the enemy the cover of the dense scrub-oak in front, from which they could pour in their volleys in comparative safety. The men held their position with an obstinacy that adds new laurels to the character of the American soldiers, but it was too late. Down on either flank came the overwhelming enemy. Fiercely pushed in front, with a wall of bayonets closing in on either side, like the contracting iron chamber of the Inquisition, what could they do but what they did? Speedily their resistance became less obstinate, more and more rapidly they fell back, less and less frequent became their returning volleys. The enemy pushed their advantage. They were already within our lines; they had driven one division from all its camps, and nearly opened, as they supposed, the way to the river. Just here--between 9 and 10 o'clock--McArthur's Brigade of W. H. L. Wallace's Division came up to give some assistance to Stuart's Brigade of Sherman's Division on the extreme left, now in imminent danger of being cut off by Prentiss's defection. McArthur mistook the way, marched too far to the right, and so, instead of reaching Stuart, came in on the other side of the Rebels, now closely pushing Prentiss. His men at once opened vigorously on the enemy, and for a time they seemed likely still to save our imperilled division. But coming unawares, as they seem to have done, upon the enemy, their positions were not well chosen, and all had to fall back together. General Prentiss seems here to have become separated from a large portion of his command. The division fell into confusion; fragments of brigades and regiments continued the fight, but there was no longer concert of action or continuity of lines of defence. Most of the troops drifted back behind the new lines that were being formed; many, as they continued an isolated struggle, were surrounded and taken prisoners.