The grizzly bears have their caves, to which they retire when the cold of winter renders them torpid; and this condition is taken advantage of by the most intrepid of the hunters. Having satisfied themselves about the cave, these men prepare a candle from wax taken from the comb of wild bees, and softened by the grease of the bear. It has a large wick, and burns with a brilliant flame. Carrying this before him, with his rifle in a convenient position, the hunter enters the cave. Having reached its recesses, he fixes the candle on the ground, lights it, and the cavern is soon illuminated with a vivid light. The hunter now lies down on his face, having the candle between the back part of the cave where the bear is, and himself. In this position, with the muzzle of the rifle full in front of him, he patiently awaits his victim. Bruin is soon roused by the light, yawns and stretches himself, like a person awaking from a deep sleep. The hunter now cocks his rifle, and watches the bear turn his head, and with slow and waddling steps approach the candle. This is a trying moment, as the extraordinary tenacity of life of the grizzly bear renders an unerring shot essential. The monster reaches the candle, and either raises his paw to strike, or his nose to smell at it. The hunter steadily raises his piece; the loud report of the rifle reverberates through the cavern; and the bear falls with a heavy crash, pierced through the eye, one of the few vulnerable spots through which he can be destroyed. The Zoological Society have at various times possessed five specimens of the grizzly bear. The first was Old Martin, for many years a well known inhabitant of the Tower Menagerie. We remember him well as an enormous brute, quite blind from cataract, and generally to be seen standing on his hind legs with open mouth, ready to receive any tit-bit a compassionate visitor might bestow. Notwithstanding the length of time he was in confinement (more than twenty years), all attempts of conciliation failed, and to the last he would not permit of the slightest familiarity, even from the keeper who constantly fed him. Some idea may be formed of his size, when we say that his skull (which we recently measured) exceeds in length by two inches the largest lion's skull in the Osteological Collection, although several must have belonged to magnificent animals.