Civil Hospital, Port Louis, 22d June 1861. CANADA. Diseases of malarious origin are most numerous among Indians as well as whites, the former comparing favourably with the latter as far as health is concerned. R. H. DEE, M.D. MANITOWANING. [Sidenote: Vide Tables X. and Y. pp. 52 and 53.] As regards the diseases it is easy to perceive that some predominate over others; for instance, chronicus rheumatismus, worms, porrigo, bronchitis chronica, phthisis pulmonalis, and others. These, of course, in a great measure originate from the careless and dirty habits of the semi-civilized Indians, along with their daily exposure to all sorts of weather without having different clothing to wear in winter from that which they have been in the habit of using during the summer; in addition to which, their living principally upon corn and potatoes (fish not always being procurable), which induces the production of worms, and at the same time being a sort of food very unsuitable for children. Scrofula is universal amongst them, and in a great measure is produced from their near intermarriages; and it is quite a common circumstance for a boy of 16 or 17 to marry a girl of the same age, and very often much younger; hence the offspring of such parents must necessarily be weak and degenerate, and in consequence of their hereditary debility more liable to the attacks of illness. Again, those Indians uncivilized living at a great distance in the interior, and who come down occasionally to trade with the Hudson’s Bay Company, I have always been given to understand were for the most part generally healthy, much more so than those of the semi-civilized tribes. I myself have had but little communication with them, as they seldom visit our island, but the officers of the Company’s service, with whom I have become acquainted, have always expressed but one opinion upon the subject. DAVID LAYTON. In running over the diseases for the last five years, many cases of common occurrence, not of dangerous or severe nature, are omitted, from the fact that no particular inventory was required, so that the enclosed number of cases are merely taken at the time of attendance from their symptoms and necessity for peculiar or active treatment.