All the Canadians now required was a proper leader and a system of organization to cause them to act vigorously against Arnold. Even in the absence of these requisites they determined to raise the siege, and, led by a gentleman of the name of Beajeau, a force advanced toward Quebec, on March 25th, but was defeated by the Americans, and compelled to retreat. This check, however, did not discourage the Canadians, who now resolved to surprise a detachment of the enemy at Point Levi. By some means their design became known, and they were very roughly handled. The month of April passed without producing any events of importance. The Americans had meanwhile been reënforced to over two thousand men, and Major-General Thomas had arrived to take the command. The smallpox still continued to rage among them; besides they could make no impression on the fortifications, and the hostile attitude of the Canadians disheartened them, so nothing was effected. On May 5th Thomas called a council of war, at which an immediate retreat was determined on. On the following morning, to the great joy of the besieged, the Surprise frigate and a sloop arrived in the harbor, with one hundred seventy men of the Twenty-ninth regiment and some marines, who were speedily landed. Now General Carleton at once resolved on offensive operations, and marched out at noon with one thousand men and a few field-pieces to attack the Americans. But the latter did not await his approach, and fled with the utmost precipitation, leaving all their cannon, stores, ammunition, and even their sick behind. These were treated with the utmost attention by General Carleton, whose humanity won the esteem of all his prisoners, who were loud in his praise on returning home. For his services during the siege the Governor was knighted by his sovereign. The Americans retreated as rapidly as possible for a distance of forty-five miles up the river, but finding they were not pursued they halted for a few days to rest themselves. They then proceeded in a distressed condition to Sorel, where they were joined by some reënforcements, and where, also, their general, Thomas, died of the smallpox, which still continued to afflict them. He was succeeded in the chief command by General Sullivan.