I queried whether the country was subject to any other diseases, such as consumption. "If you have any friend with a consumption," said he, "send him to Thamesville; consumption would walk off slick as soon as he got the ague. No disorder is guilty of coming on before it, and it leaves none behind." We left Chatham in the steamboat Brothers for Windsor at three o'clock p.m., after having had a very good dinner at Captain Ebbert's inn, the Royal Exchange, which would do credit to any town. The Thames rolls for some miles, broad and deep, through a succession of corn-fields and meadows, with fine settlements, and, after passing through the great western marshes, enters Lake St. Clair, at twenty miles from Chatham. The rest of the route is across the lake by its southern shore, twenty miles more, and into the Detroit river for eleven miles to Windsor, on the Canada shore, and the city of Detroit, on the American side. The Thames keeps up its English character well, for it passes through the townships of Chatham, Dover, Harwich, Raleigh, and Tilbury, before it reaches Lake St. Clair, and then we coast Rochester, Maidstone, and Sandwich. The most curious thing on this route is the sinuosity of the river and the immense marsh, where the grasses are so luxuriant, that its appearance is that of the Pampas of South America, or of one unbroken sea of verdure. Nor is the grass, in its luxuriance, the only reminiscence of those vast meadows. Three hundred thousand acres, wholly unreclaimed on both sides of the river, are filled, particularly on the south side, with droves of wild horses and cattle--the former so numerous, that strings of them may be seen as far as the eye can reach; nor can you see the whole even near you from the deck of the vessel, as the grass is so high that sometimes they are hidden, and frequently you observe only their backs. They live here both in summer and in winter, but in very severe weather are said to go ashore, or into the higher lands, in search of the bark of the red elm. The owners brand them on the shoulder, and they are caught, when any are wanted, by snaring them with a noose. These horses are small, and usually dark-coloured; and a good one is valued at fifty dollars, or twelve pounds ten shillings currency, about ten pounds English money. Hardy, patient, and excellent little animals they are. I thought of the worthy lieutenant-governor of Upper Canada, Sir Francis Bond Head, when these wild horses of Canada first met my sight, as I saw, on a small scale, that which he has so vividly represented on so splendid a one in South America.