Lake St. Louis, commencing, or rather terminating, at La Chine, for that village stands at the lower end of it, is about twelve miles in length and four in breadth. At its uppermost extremity it receives a large branch of the Utawas River, and also the south-west branch of the River St. Lawrence, which by some geographers is called the River Cadaraqui, and by others the River Iroquois; but in the country, generally speaking, the whole of that river, running from Lake Ontario to the Gulph of St. Lawrence, goes simply under the name of the St. Lawrence. At the upper end of Lake St. Louis the water is very shallow, owing to the banks of mud and sand washed up by the two rivers. These very extensive banks, are entirely covered with reeds, so that when a vessel sails over them she appears at a little distance to be absolutely sailing over dry land. As we passed along this part of the lake we were enveloped with clouds of little insects, different from any I ever saw before or afterwards in the country; but they are common, it is said, on various parts of the River St. Lawrence. Their size was somewhat larger than that of the gnat; their colour a pure white; and so delicately were they formed, that by the slightest touch they were destroyed and reduced to powder. They were particularly attracted by any white object, and having once alighted were not to be driven away but by force. The leaves of a book, which I happened to have in my hand, were in a few seconds so thickly covered by them that it was impossible to discern a single letter, and no sooner was one swarm of them brushed off than a fresh one immediately alighted. These insects have very broad wings in proportion to their size, and fly heavily, so that it is only when the air is remarkably calm that they can venture to make their appearance. [Sidenote: ENCAMPMENT.]