From Seabrook to James Island, the Twenty-fourth moved, in July, 1863, under Gen. Terry, in co-operation with Gen. Gillmore's advance on Morris Island. Stricken down with sunstroke there, his whole system prostrate under repeated attacks of fever and chills, fastened on him in the malarial regions of his recent service, Manning lay sick in the rude regimental hospital on the morning of July 16, when the enemy in force made a sudden attack on the Union lines. The shock of this battle was bravely met by Col. Shaw's Fifty-fourth Massachusetts regiment, then first in action. The hospital of the Twenty-fourth was found to be in the focus of the enemy's sharpest fire, and a hurried move was ordered down the island. As the poor invalids, with failing limbs, dragged their tedious way to the beach, shell after shell from the enemy's guns came shrieking past, or bursting among them. One such seemed to explode in Manning's very face, and he fell, with the half conviction that it had killed him. As he rose again to his feet, another burst above him, and a ragged fragment of the hot iron tore down along his very side, laying open his clothing, and bruising and lacerating his arm. But this injury probably saved him from a severer; for, checked by it a moment, he saw yet another shell explode directly before him, in the group he had fallen behind, killing and wounding not a few of that number. Sorry comfort, this, for sick soldiers! Yet such was but an incident in the trying army service of our Union soldiers, in the prolonged war with rebellion. CHARLESTON SIEGE-WORK.--SHARPSHOOTING. Immediately after the fight at James Island, the Twenty-fourth passed over to Morris Island, to have a part in the operations against Charleston from that point, commencing with that terrible assault on Fort Wagner in which Col. Shaw lost his life,--when Gen. Stevenson's brigade (including the Twenty-fourth) was in reserve, holding the front after the sad repulse. There, Manning was again stricken down with sunstroke. Later, he was assigned to a company of sharpshooters in active service at the extreme front. He then had narrow escapes daily. On one occasion, as he and a comrade were alternating in rifle firing through a loop-hole, he had thrown himself down to rest under his rubber blanket, raised for a shade, when a bullet wounded his comrade in the face; as he sprang up to aid him, a huge fragment of a mortar shell came tearing down through the air, and crushed the rubber blanket into the ground on the very spot where Manning had lain. Those were toilsome days on Morris Island, in the slow dragging siege; men who were there will not soon forget its shifting sands, its blazing sunlight, its unintermitted fire of artillery and musketry, its labors on traverse and parallel and sap, its frequent struggles of sortie or assault, and its atmosphere laden with disease: