down a stream, and constructing a dam with them, and afterwards building its singular houses or lodges in the water, would seem to indicate the presence of a rational power. But there are many other creatures-- birds, insects, and quadrupeds--that exhibit instincts quite as surprising. Nevertheless the habits of the beaver are curious in the extreme, and deserve to be given in detail. The best account of them is that of the old and truthful traveller Hearne: upon whose homely but accurate observations scores of fireside naturalists have established a measure of their fame. We shall leave _him_ to tell the story of these singular animals. "The beavers," he says, "being so plentiful, the attention of my companions was chiefly engaged on them, as they not only furnished delicious food, but their skins proved a valuable acquisition,--being a principal article of trade, as well as a serviceable one for clothing. The situation of the beaver-houses are various. Where the beavers are numerous, they are found to inhabit lakes, ponds, and rivers, as well as those narrow creeks which connect the numerous lakes with which this country abounds; but the two latter are generally chosen by them when the depth of water and other circumstances are suitable, as they have then the advantage of a current to convey wood and other necessaries to their habitations; and because, in general, they are more difficult to be taken than those that build in standing water. They always choose those parts that have such a depth of water as will resist the frost in winter, and prevent it from freezing to the bottom. The beavers that build their houses in small rivers or creeks, in which water is liable to be drained off when the back supplies are dried up by the frost, are wonderfully taught by instinct to provide against that evil by making a dam quite across the river, at a convenient distance from their houses. The beaver-dams differ in shape, according to the nature of the place in which they are built. If the water in the river or creek have but little motion, the dam is almost straight; but when the current is more rapid, it is always made with a considerable curve, convex towards the stream. The materials made use of are drift-wood, green willows, birch, and poplars if they can be got; also mud and stones, intermixed in such a manner as must evidently contribute to the strength of the dam; but there is no other order or method observed in the dams, except that of the work being carried on with a regular sweep, and all the parts being made of equal strength. In places which have been long frequented by beavers undisturbed, their dams, by frequent repairing, become a solid bank, capable of resisting a great force both of water and ice; and as the willow, poplar, and birch generally take root and shoot up, they by degrees form a regular planted hedge, which I have seen in some places so tall, that birds have built their nests among the branches.