It was reported about this time that in the district of London a similar disposition to rise had been observed, and in consequence a militia force of about 400 men was sent into that district, where it was speedily joined by three times as many of the inhabitants of the district, who assembled voluntarily and came to their aid with the greatest alacrity. It was discovered that about 300 persons under Dr. Duncombe, an American by birth, were assembled with arms, but before the militia could reach them they dispersed themselves and fled. Of these by far the greater came in immediately and submitted themselves to the Government, declaring that they had been misled and deceived, and praying for forgiveness. In about a week perfect tranquillity was restored, and from that moment not a man has been seen in arms against the Government in any part of the Province, with the exception of the hostile aggression upon Navy Island, which I shall presently notice; nor has there been the slightest resistance offered to the execution of legal process in a single instance. After the dispersion of the armed insurgents near Toronto Mr. McKenzie, their leader, escaped in disguise to the Niagara River and crossed over to Buffalo. Reports had been spread there and elsewhere along the American frontier that Toronto had been burnt and that the rebels were completely successful, but the falsehood of these absurd rumors was well known before McKenzie arrived on the American side. It was known also that the ridiculous attempt of 400 men to revolutionize a country containing nearly half a million inhabitants had been put down by the people instantly and decidedly without the loss of a man. Nevertheless, a number of American citizens in Buffalo and other towns on the frontier of the State of New York enlisted as soldiers, with the avowed object of invading Canada and establishing a provisional government. Public meetings were held to forward this design of invading a country with which the United States were at peace. Volunteers were called for, and arms, ammunition, and provisions were supplied by contributions openly made. All this was in direct and flagrant violation of the express laws of the United States, as well as of the law of nations. The civil authority of Buffalo offered some slight shew of resistance to the movement, being urged to interpose by many of the most respectable citizens. But no real impediment was offered, and on the 13th of December some hundreds of the citizens of the State of New York, as an armed body under the command of a Mr. Van Rensselaer, an American citizen, openly invaded and took possession of Navy Island, a part of Upper Canada, situate in the Niagara River. Not believing that such an outrage would really be committed, no force whatever was assembled at the time to counteract this hostile movement.