To General Montgomery. This moment arrived from Colonel Allen's defeat, Captain Duggan with the following intelligence: Colonel Allen is absolutely taken captive to Montreal with a few more, and about two or three killed, and about as many wounded. The living are not all come in. Something of a slaughter made among the King's troops. From yours to serve, SETH WARNER. Schuyler, Montgomery, and Livingston, in letters written after the defeat, comment on Allen's imprudence in making the attack single-handed, but no mention is made of Brown, with whose force Allen expected to be re-enforced, and with whose help the tide of battle might have been turned and Canada's future might have been entirely changed. CHAPTER XI. ALLEN'S NARRATIVE.--ATTACK ON MONTREAL.--DEFEAT AND SURRENDER.--BRUTAL TREATMENT.--ARRIVAL IN ENGLAND.--DEBATES IN PARLIAMENT. The story of Allen's captivity is best told in his own vivid narrative as follows: On the morning of the 24th day of September I set out with my guard of about eighty men, from Longueuil, to go to Laprairie, from whence I determined to go to General Montgomery's camp; I had not advanced two miles before I met with Major Brown, who has since been advanced to the rank of a colonel, who desired me to halt, saying that he had something of importance to communicate to me and my confidants; upon which I halted the party and went into a house, and took a private room with him and several of my associates, where Colonel Brown proposed that, provided I would return to Longueuil and procure some canoes, so as to cross the river St. Lawrence a little north of Montreal, he would cross it a little to the south of the town, with near two hundred men, as he had boats sufficient, and that we could make ourselves masters of Montreal. This plan was readily approved by me and those in council, and in consequence of which I returned to Longueuil, collected a few canoes, and added about thirty English-Americans to my party and crossed the river in the night of the 24th, agreeably to the proposed plan.