The little flotilla of eleven vessels got safely down to within a few miles of Sorel, when one grounded and delayed the rest till the wind failed altogether at noon on the 12th. The next three days it blew upstream without a break. No progress could be made as there was no room to tack in the narrow passages opposite Sorel. On the third day an American floating battery suddenly appeared, firing hard. Behind it came a boat with a flag of truce and the following summons from Colonel Easton, who commanded Montgomery's advance-guard at Sorel: SIR,--By this you will learn that General Montgomery is in Possession of the Fortress Montreal. You are very sensible that I am in Possession at this Place, and that, from the strength of the United Colonies on both sides your own situation is Rendered Very disagreeable. I am therefore induced to make you the following Proposal, viz.:--That if you will Resign your Fleet to me Immediately, without destroying the Effects on Board, You and Your men shall be used with due civility, together with women & Children on Board. To this I shall expect Your direct and Immediate answer. Should you Neglect You will Cherefully take the Consequences which will follow. Carleton was surprised: and well he might be. He had not supposed that Montgomery's men were in any such commanding position. But, like Cramahe at Quebec, he refused to answer; whereupon Easton's batteries opened both from the south shore and from Isle St Ignace. Carleton's heaviest gun was a 9-pounder; while Easton had four 12-pounders, one of them mounted on a rowing battery that soon forced the British to retreat. The skipper of the schooner containing the powder magazine wanted to surrender on the spot, especially when he heard that the Americans were getting some hot shot ready for him. But Carleton retreated upstream, twelve miles above Sorel, to Lavaltrie, just above Berthier on the north shore, where, on attempting to land, he was driven back by some Americans and habitants. Next morning, the 16th, a fateful day for Canada, the same Major Brown who had failed Ethan Allen at Montreal came up with a flag of truce to propose that Carleton should send an officer to see for himself how well all chance of escape had now been cut off. The offer was accepted; and Brown explained the situation from the rebel point of view. 'This is my small battery; and, even if you should chance to escape, I have a grand battery at the mouth of the Sorel [Richelieu] which will infallibly sink all of your vessels. Wait a little till you see the 32-pounders that are now within half-a-mile.' There was a good deal of Yankee bluff in this warning, especially as the 32-pounders could not be mounted in time. But the British officer seemed perfectly satisfied that the way was completely blocked; and so the Americans felt sure that Carleton would surrender the following day.