They arrived in the advance, just as Arnold was leading on his forlorn hope to attack the barrier. Before he reached it, a severe wound in the right leg with a musket ball completely disabled him, and he had to be borne from the field. Morgan instantly took the command. Just then Lamb came up with his company, armed with muskets and bayonets, having received orders to abandon the field-piece, and support the advance. Oswald joined him with the forlorn hope. The battery which commanded the defile mounted two pieces of cannon. There was a discharge of grape-shot when the assailants were close under the muzzles of the guns, yet but one man was killed. Before there could be a second discharge, the battery was carried by assault, some firing into the embrasures; others scaling the walls. The captain and thirty of his men were taken prisoners. The day was just dawning as Morgan led on to attack the second barrier, and his men had to advance under a fire from the town walls on their right, which incessantly thinned their ranks. The second barrier was reached; they applied their scaling ladders to storm it. The defence was brave and obstinate, but the defenders were at length driven from their guns, and the battery was gained. At the last moment one of the gunners ran back, linstock in hand, to give one more shot. Captain Lamb snapped a fusee at him. It missed fire. The cannon was discharged, and a grape-shot wounded Lamb in the head, carrying away part of the cheek-bone. He was borne off senseless, to a neighboring shed. The two barriers being now taken, the way on this side into the lower town seemed open. Morgan prepared to enter it with the victorious vanguard; first stationing Captain Dearborn and some provincials at Palace Gate, which opened down into the defile from the upper town. By this time, however, the death of Montgomery and retreat of Campbell, had enabled the enemy to turn all their attention in this direction. A large detachment sent by General Carleton, sallied out of Palace Gate after Morgan had passed it, surprised and captured Dearborn and the guard, and completely cut off the advanced party. The main body, informed of the death of Montgomery, and giving up the game as lost, retreated to the camp, leaving behind the field-piece which Lamb’s company had abandoned, and the mortars in the battery of St. Roque. Morgan and his men were now hemmed in on all sides, and obliged to take refuge in a stone house, from the inveterate fire which assailed them. From the windows of this house they kept up a desperate defence, until cannon were brought to bear upon it. Then, hearing of the death of Montgomery, and seeing that there was no prospect of relief, Morgan and his gallant handful of followers were compelled to surrender themselves prisoners of war.