The American troops went bravely to work, engaging themselves chiefly with the undermining of one of the walls. To reach this it was necessary for them to pass along a narrow eminence where they were in plain view and easy range of the Spaniards. A number were lost in this dangerous enterprise, but their valor was dimmed neither by this nor by the still heavier losses which came upon them through the diseases prevalent in every portion of the British camp. Though men of such hardiness that they must have been equal in resisting power to the British, their losses were comparatively much greater, proving that they occupied positions of greater danger, either from bullets or the fevers of the region. MORRO CASTLE TAKEN. Five days after the arrival of the reinforcements, Lord Albemarle judged himself sufficiently strong to assault Morro Castle, and the word was accordingly given. The sunken ships were blown up early on the morning of July 25, and the British ships sailed into the fury of the Spanish cannon, belching shot from all along the shore. The big guns of the ships could not be elevated sufficiently to silence the fire from Morro Castle, and this was accordingly left to be carried by assault. The Puntal was silenced, troops landed, and after five days of ferocious fighting, in which the British and American losses were enormous by reason of their exposed position, and where every one concerned exhibited the utmost valor, Morro Castle was carried by the bayonet. The fighting within its walls after an entry had been made was exceedingly fierce. The Marquis of Gonzalez was killed by his own cowardly men for refusing to surrender. The cannon from the other Spanish batteries were turned upon the Morro as soon as the Spanish flag had been lowered, and the British ensign run up in its place; and then the slow and disastrous work of the siege was taken up again. As the lines grew nearer and nearer, and the last hope of the Spaniard for relief was given up, there was the usual attempt made to buy the attacking party off. Though it would have been a hopeless undertaking at any time, the amount offered for the ransom of the city was so far below the treasure which was known to be in the town that the offer was made a subject for derisive laughter. Fifteen days after Morro Castle had fallen, though the mortality in the trenches was so great that a few weeks more must have seen the abandonment of the enterprise, the city fell, the garrison stipulating for a passage out with all the honors of war, which was freely accorded them, owing to the climatic predicament in which Lord Albemarle found himself. It was also stipulated that private property should be respected. This was strictly observed, though Spain had set repeated examples of giving a captured city over to plunder in the face of a stipulation to the contrary.