Colonel Hartwell gave the order; the colors came to the extreme front, when the colonel shouted, “Follow your colors!” The bugle sounded the charge, and then the colonel led the way himself. After an unsuccessful charge in line of battle by the Fifty-fourth and Fifty-fifth Massachusetts, the Fifty-fifth was formed in column by company, and again thrice marched up that narrow causeway in the face of the enemy’s batteries and musketry. Captain Crane, of the Fifty-fifth Massachusetts, whose company had been left in charge of Fort Delafield, at Folly Island, but who, at his own request, had gone as aide to Colonel Hartwell, was, as well as the colonel, mounted. Just as they reached the marsh in front of the turn in the road, and within a short distance of the rebel works, the horse of brave Colonel Hartwell, while struggling through the mud, was literally blown in pieces by a discharge of canister. The colonel was wounded at the same time, and attempted to jump from his horse; but the animal fell on him, pressing him into the mud. At this time, he was riding at the side of the column, and the men pressed on past; but as they neared the fort they met a murderous fire of grape, canister, and bullets at short range. As the numbers of the advance were thinned, the few who survived began to waver, and finally the regiment retreated. In retiring, Lieutenant Ellsworth, and one man of the Fifty-fifth Massachusetts, came to the rescue of Colonel Hartwell, and in spite of his remonstrance that they should leave him to his fate, and take care of themselves, released him from his horse, and bore him from the field. But before he was entirely out of range of the enemy’s fire, the colonel was again wounded, and the brave private soldier who was assisting was killed, and another heroic man lost. The Twenty-fifth Ohio, soon after the commencement of the engagement, were sent to the right, where they swung around, and fought on a line nearly perpendicular to our main front. A portion of the Fifty-fifth Massachusetts were with them. One or two charges were essayed, but were unsuccessful; but the front was maintained there throughout the afternoon. The Twenty-fifth had the largest loss of all the regiments. The colored troops fought well throughout the day. Counter-charges were made at various times during the fight by the enemy; but our infantry and artillery mowed them down, and they did not at any time get very near our lines. Whenever a charge of our men was repulsed, the rebels would flock out of their works, whooping like Indians; but Ames’s guns and the terrible volleys of our infantry would send them back. The Naval Brigade behaved splendidly.