Arnold's advance had begun at the same time as Livingston's demonstration and Montgomery's attack. But his task was very different and the time required much longer. There were three obstacles to be overcome. First, his men had to run the gauntlet of the fire from the bluejackets ranged along the Grand Battery, which faced the St Charles at its mouth and overlooked the narrow little street of Sous-le-Cap at a height of fifty or sixty feet. Then they had to take the small advanced barricade, which stood a hundred yards on the St Charles side of the actual Sault-au-Matelot or Sailor's Leap, which is the north-easterly point of the Quebec promontory and nearly a hundred feet high. Finally, they had to round this point and attack the regular Sault-au-Matelot barricade. This second barricade was about a hundred yards long, from the rock to the river. It crossed Sault-au-Matelot Street and St Peter Street, which were the same then as now. But it ended on a wharf half-way down the modern St James Street, as the outer half of this street was then a natural strand completely covered at high tide. It was much closer than the Pres-de-Ville barricade was to Mountain Hill, at the top of which Carleton held his general reserve ready in the Place d'Armes; and it was fairly strong in material and armament. But it was at first defended by only a hundred men. The American forlorn hope, under Captain Oswald, got past most of the Grand Battery unscathed. But by the time the main body was following under Morgan the British blue-jackets were firing down from the walls at less than point-blank range. The driving snow, the clumps of bushes on the cliff, and the little houses in the street below all gave the Americans some welcome cover. But many of them were hit; while the gun they were towing through the drifts on a sleigh stuck fast and had to be abandoned. Captain Dearborn, the future commander-in-chief of the American army in the War of 1812, noted in his diary that he 'met the wounded men very thick' as he was bringing up the rear. When the forlorn hope reached the advanced barricade Arnold halted it till the supports had come up. The loss of the gun and the worrying his main body was receiving from the sailors along the Grand Battery spoilt his original plan of smashing in the barricade by shell fire while Morgan circled round its outer flank on the ice of the tidal flats and took it in rear. So he decided on a frontal attack. When he thought he had a fair chance he stepped to the front and shouted, 'Now, boys, all together, rush!' But before he could climb the barricade he was shot through the leg. For some time he propped himself up against a house and, leaning on his rifle, continued encouraging his men, who were soon firing through the port-holes as well as over the top. But presently growing faint from loss of blood he had to be carried off the field to the General Hospital on the banks of the St Charles.