A little after four the sentries on the walls at Cape Diamond saw lights flashing about in front of them and were just going to call the guard when Captain Malcolm Fraser of the Royal Emigrants came by on his rounds and saw other lights being set out in regular order like lamps in a street. He instantly turned out the guards and pickets. The drums beat to arms. Every church bell in the city pealed forth its alarm into that wild night. The bugles blew. The men off duty swarmed on to the Place d'Armes, where Carleton, calm and intrepid as ever, took post with the general reserve and waited. There was nothing for him to do just yet. Everything that could have been foreseen had already been amply provided for; and in his quiet confidence his followers found their own. Towards five o'clock two green rockets shot up from Montgomery's position beside the Anse des Meres under Cape Diamond. This was the signal for attack. Montgomery's column immediately struggled on again along the path leading round the foot of the Cape towards the Pres-de-Ville barricade. Livingston's serious 'patriots' on the top of the Cape changed their dropping shots into a hot fire against the walls; while Jerry Duggan's little mob of would-be looters shouted and blazed away from safer cover in the suburbs of St John and St Roch. Arnold's mortars pitched shells all over the town; while his storming-party advanced towards the Sault-au-Matelot barricade. Carleton, naturally anxious about the landward walls, sent some of the British militia to reinforce the men at Cape Diamond, which, as he knew, Montgomery considered the best point of attack. The walls lower down did not seem to be in any danger from Jerry Duggan's 'patriots,' whose noisy demonstration was at once understood to be nothing but an empty feint. The walls facing the St Charles were well manned and well gunned by the naval battalion. Those facing the St Lawrence, though weak in themselves, were practically impregnable, as the cliffs could not be scaled by any formed body. The Lower Town, however, was by no means so safe, in spite of its two barricades. The general uproar was now so great that Carleton could not distinguish the firing there from what was going on elsewhere. But it was at these two points that the real attack was rapidly developing.