The terrible fire of this artillery was supplemented by continued, but desultory infantry attacks. The Crescent regiment of Louisiana essayed to charge, but recoiled. Patton Anderson led his brigade up, but was driven back. About four o'clock, Hurlbut, whose right had joined Prentiss' left, finally gave way, and Bragg, following him, passed on to the rear of Prentiss. By half-past four the fighting in front of Sherman and McClernand had ceased, and Cheatham, Trabue, Johnson, and Russell, finding that Wallace could not be approached across the dense tangle filling the great ravine which protected his right, felt their way unopposed to the plateau in his rear, meeting the combined force under Bragg in front of Hurlbut's camp. General Polk collected in front of the steadfast men of Prentiss and Wallace all the other troops within reach, and at five o'clock, with one mighty effort, surged against their line, now pounded by Ruggles' batteries. When Hurlbut fell back, leaving Prentiss and Wallace entirely isolated, these two commanders consulted and resolved to hold their position at all hazards, and keep the enemy from passing on to the landing. But when they became enveloped, almost encircled, the enemy having passed behind them toward the landing and were closing upon the Corinth road in their rear, Wallace ordered his command to retire and cut a way through. Tuttle gave the order to his brigade, which faced about to the rear and opened fire on the forces closing behind. The Second and Seventh Iowa, led by Colonel Tuttle, charged, cut their way through, and marched to the landing. The Twelfth and Fourteenth Iowa, lingering with the Eighth Iowa to cover the retreat of Hickenlooper's battery, were too late, and found themselves walled in. Colonel Baldwin, who had succeeded to the command of the other brigade when Colonel Sweeney was wounded, brought off part of his command; but two of his regiments, the Fifty-eighth Illinois as well as the Eighth Iowa, were securely enclosed. Wallace fell mortally wounded. Groups and squads of Prentiss' men succeeded in making their way out before the circle wholly closed. Prentiss, with the remaining fragments of the two divisions, facing the fire that surrounded them, made a desperate struggle. But further resistance was hopeless and was useless. Prentiss, having never swerved from the position he was ordered to hold, having lost everything but honor, surrendered the little band. According to his report, made after his return from captivity, the number from both divisions surrendered with him was 2,200. The statements vary as to the precise hour of the surrender, and as to what command surrendered last. Colonel Shaw, of the Fourteenth Iowa, who fought toward the rear before surrendering, says that at the time he yielded he compared watches with his captor, and both agreed it was about a quarter to six; he adds that the Eighth and Twelfth Iowa and Fifty-eighth Illinois surrendered at about the same