At the head of these troops, he hoped to effect a junction with M'Clean, after which he designed to march with his whole force against Montgomery, and endeavour to raise the siege; but, on attempting to cross over from Montreal, he was encountered and entirely defeated at Longueisle by a detachment of the American troops under Colonel Warner.

Another party advanced on M'Clean.

Being entirely abandoned by his Canadians so soon as they were informed of the defeat of the governor, and having also received information that Arnold was approaching Point Levi, M'Clean retreated to Quebec.

The Americans occupied the post he had abandoned, and erected batteries on a point of land at the junction of the Sorel with the St.Lawrence; where they also constructed several armed rafts and floating batteries, in order to prevent Carleton with the vessels at Montreal from escaping down the river.
[Sidenote: St.Johns capitulates.] {November 3.} Montgomery was pressing the siege of St.John's with great vigour, and had advanced his works near the fort, when the account of the success at Longueisle reached him.

On receiving this intelligence, he sent a flag by one of the prisoners, with a letter to Major Preston, the commanding officer, demanding a surrender of the place.