The Esquimaux wolf-trap is made of strong slabs of ice, long and so narrow, that a fox can with difficulty turn himself in it, and a wolf must actually remain in the position in which he is taken. The door is a heavy portcullis of ice, sliding in two well-secured grooves of the same substance, and is kept up by a line which, passing over the top of the trap, is carried through a hole at the farthest extremity. To the end of the line is fastened a small hoop of whale-bone, and to this any kind of flesh bait is attached. From the slab which terminates the trap, a projection of ice, or a peg of bone or wood, points inward near the bottom, and under this the hoop is slightly hooked; the slightest pull at the bait liberates it, the door falls in an instant, and the wolf is speared where he lies. Sir John Richardson states that, when near the Copper Mines River in North America, he had more than once an opportunity of seeing a single wolf in pursuit of a reindeer, and especially on Point Lake, when covered with ice, when a fine buck reindeer was overtaken by a large white wolf, and disabled by a bite in the flank. An Indian, who was concealed, ran in and cut the deer's throat with his knife, the wolf at once relinquishing his prey and sneaking off. In the chase the poor deer urged its flight by great bounds, which for a time exceeded the speed of the wolf; but it stopped so frequently to gaze on its relentless enemy, that the latter, toiling on at a long gallop (so admirably described by Byron), with his tongue lolling out of his mouth, gradually came up. After each hasty look, the deer redoubled its efforts to escape, but, either exhausted by fatigue or enervated by fear, it became, just before it was overtaken, scarcely able to keep its feet.