According to their occupations, and the various domestic animals employed by them, they are distinguished by the names of Reindeer, Horse, Dog, Forest, and River Tungusi; but although they are found from the basins of the Upper, Middle, and Lower Tunguska to the western shores of the Sea of Ochotsk, and from the Chinese frontiers and the Baikal to the Polar Ocean, their whole number does not amount to more than 30,000, and diminishes from year to year, in consequence of the ravages of the small-pox and other epidemic disorders transmitted to them by the Russians. Only a few rear horses and cattle, the reindeer being generally their domestic animal; and the impoverished Tunguse, who has been deprived of his herd by some contagious disorder or the ravages of the wolves, lives as a fisherman on the borders of a river, assisted by his dog, or retires into the forests as a promyschlenik, or hunter. Of the miseries which here await him, Wrangell relates a melancholy instance. In a solitary hut in one of the dreariest wildernesses imaginable, he found a Tunguse and his daughter. While the father, with his long snow-shoes, was pursuing a reindeer for several days together, this unfortunate girl remained alone and helpless in the hut--which even in summer afforded but an imperfect shelter against the rain and wind--exposed to the cold, and frequently to hunger, and without the least occupation. No wonder that the impoverished Tungusi not seldom sink into cannibalism. Neither the reindeer nor the dogs, nor the wives and children of their more fortunate countrymen, are secure from the attacks and voracity of these outcasts, who, in their turn, are treated like wild beasts, and destroyed without mercy. A bartering trade is, however, carried on with them, but only at a distance, and by signs; each party depositing its goods, and following every motion of the other with a suspicious eye.