Accordingly, while the batteries on Point Lévis were constructing, the English General resolved to see whether a vulnerable point could be found on Montcalm's left flank. On the 8th of July, leaving a detachment to hold the camp on the Isle of Orleans, he sent Townsend's and Murray's brigades across to the northern bank of the St. Lawrence, where they proceeded to entrench themselves on the eastern side of the Montmorenci. The movement was highly perilous, since it divided his force into three portions, no one of which could support the other; but the French kept themselves rigidly on the defensive, though the British lay but a gunshot from them across the rocky gorge of the Montmorenci and annoyed their camp not a little with their artillery. Still Wolfe could accomplish nothing decisive. The news that Amherst was advancing against Ticonderoga did indeed discourage the Canadians and increase desertion among them; but in all other respects the operations before Quebec had come to a deadlock. [Sidenote: July 18.] [Sidenote: July 28.] Now, however, the fleet which had already vanquished the difficulties in the navigation of the St. Lawrence once more came forward to show the way. It was the opinion of the French that no vessel could pass the batteries of Quebec without destruction; but on the night of the 18th of July H.M.S. _Sutherland_, of fifty guns, with several smaller vessels, sailed safely up the river, covered by the fire of the guns on Point Lévis, destroyed some small craft which they found there and anchored above the town. This was the first menace of an attempt to take Quebec in reverse, and obliged Montcalm to detach six hundred men from the camp of Beauport to defend the few accessible points between the city and Cap Rouge, some eight miles above it. Wolfe took advantage of the movement also to send a detachment to ravage the country to westward of Quebec; but though he thus added a fourth to the three isolated divisions into which he had broken up his army, Montcalm still declined to move. A second attempt was indeed made to destroy the British vessels by fire-ships, which was frustrated like the first by the coolness and gallantry of the British sailors; but beyond this French aggression would not go. Montcalm was resolved to play the part of Fabius, and he seemed likely to play it with success.