On hearing of Schuyler’s and Montgomery’s advance Carleton at once hurried back from Quebec to Montreal. There were two possibilities of saving the town, and with it, perhaps, the whole of Canada. One was by obtaining reinforcements from the British army at Boston, the other by contriving, even without reinforcements, to hold the forts at St. John’s and Chambly until winter drove the invaders back whence they had come. Early in September Carleton applied to Boston for two regiments, the same number that in the previous autumn he had sent to Boston at Gage’s request; his message came to hand on the 10th of October, just as Gage was leaving for England, and Howe, who took over the command of the troops, at once prepared to send the men. But there was a blight on English sailors as on English soldiers in America in these days. Admiral Graves, who commanded the ships, refused to risk the dangers of the passage from Boston to Quebec at the season of the year, and Carleton in his sore straits was left unaided. All, therefore, turned on the defence of the forts. [Sidenote: The siege of St. John’s and Chambly.] [Sidenote: The two forts taken.] St. John’s fort was manned by between 600 and 700 men, 120 of whom were Canadian volunteers, the rest being regulars. Chambly was held by some 80 men of the line. A few men were stationed at Montreal, but Quebec was almost emptied of its garrison. Major Preston,[85] of the 26th Regiment, commanded at St. John’s, and Chambly was in charge of Major Stopford. On the 18th of September Montgomery laid siege to the former fort, cutting off communication between the defenders and the outside world; but, notwithstanding, news reached Preston of Allen’s unsuccessful attempt on Montreal, and he held out bravely, helped by the fact that Montgomery had hardly any artillery, and could only rely on starving out the garrison, while his own men were suffering from exposure, privations, and want of ammunition. But in the middle of October the outlook was changed, for, after less than two days’ siege, the fort at Chambly, said to have been well provisioned, and with ample means of defence, was on the 17th of that month surrendered,[86] providing Montgomery with supplies, guns, and ammunition to be used against the main fort. Preston’s condition was now desperate. An attempt made by Carleton to cross from Montreal to his relief on the 30th of October was beaten back, and on the 2nd of November, St. John’s surrendered, after having held out for forty-five days. [Sidenote: Carleton leaves Montreal,] [Sidenote: which is occupied by the Americans.] [Sidenote: Carleton narrowly escapes capture and reaches Quebec.]