"Yes," added Leonard, "tell us that you have caught a weasel asleep, and we will, at least, look credulous; but this turning white with the first snow, and brown as soon as the snow is gone, is a little off color."
"It's true, nevertheless," maintained the doctor, "although I have seen no satisfactory explanation of the changes. They not only make their nests in hollow trees, but in the sides of banks. Were it not for its habit of destroying the eggs and young of birds, the least weasel might be regarded as a wholly useful creature, for it devours innumerable mice, moles, shrews, and insects, and does not attack larger animals or poultry. It is so exceedingly lithe and slender that its prey has no chance to escape. Where a mouse or a mole can go it can go also, and if outrun in the field, it follows the scent of its game like a hound, and is as relentless as fate in its pursuit. They are not very shy, and curiosity speedily overcomes their timidity. Sit down quietly, and they will investigate you with intense interest, and will even approach rather near in order to see better. Dr. Merriam describes one as standing bolt-upright, and eying him, with its head bent at right angles to its slender body. After a brief retreat it made many partial advances toward him, meanwhile constantly sniffing the air in his direction. I've no doubt Dr. Merriam would have liked to know the weasel's opinion. They have two or three litters a year, and the nest is made of dry leaves and herbage. The mother weasel will defend her young at any cost, and never hesitates to sacrifice her life in their behalf. She will fasten herself by her sharp teeth to the nose of a dog, and teach him that weasel-hunting has some drawbacks.
"In its next of kin, the ermine, or large weasel, we have perhaps the most cruel and bloodthirsty animal in existence. It is among mammals what the butcher-bird is among the feathered tribes—an assassin, a beautiful fiend. It would seem that nature reproduces among animals and plants every phase of human character. Was it Nero or Caligula who said, 'Oh, that Rome had but one neck, that I might sever it?' Such is the spirit that animates the ermine. Its instinct to kill is so strong that, were it possible, it would destroy the means of its subsistence. It would leave none of its varied prey alive. The lion and even the man-eating tiger, when gorged, are inert and quiet. They kill no more than they want for a meal; but the ermine will attack a poultry-yard, satiate itself with the brains of the fowls or by sucking their blood, and then, out of 'pure cussedness,' will kill all the rest within reach. Fifty chickens have been destroyed in a night by one of these remorseless little beasts. It makes fearful ravages among grouse, rabbits, and hares. It is the mythical vampire embodied. It is not very much larger than the least weasel, and has the same long, lithe, slender body and neck. A gray squirrel would look bulky beside one, but in indomitable courage and pitiless ferocity I do not think it has an equal. Only a lack of material or bodily fatigue suspends its bloody work, and its life is one long career of carnage. It has a terrific set of teeth, which are worked by most powerful muscles. Dr. Coues, an eminent naturalist, has given a graphic account of him. His words, as I remember them, are a true portrait of a murderer. 'His forehead is low, and nose sharp; his eyes are small, penetrating, cunning, and glitter with an angry green light. His fierce face surmounts a body extraordinarily wiry, lithe, and muscular, which ends in a singularly long, slender neck that can be lifted at right angles with the body. When he is looking around, his neck stretched up, his flat triangular head bent forward, swaying to and fro, we have the image of a serpent.'
"This is a true picture of the ermine when excited or angry; when at rest, and in certain conditions of his fur, there are few more beautiful, harmless, innocent-looking creatures. Let one of the animals on which he preys approach, however, and instantly he becomes a demon. In the economy of nature he often serves a very useful purpose. In many regions field mice are destructive. The ermine is their deadliest foe. A rat will fight a man, if cornered, but it gives up at once in abject terror when confronted by the large weasel. This arch-enemy has a pride in his hunting, and when taking up his quarters in a barn will collect in one place all the rats and mice he kills. Sometimes a hundred or more have been found together as the result of two or three nights' work. The ermine hunts, however, both by day and night, and climbs trees with great facility. He is by no means shy, and one has been known to try to kill chickens in a coop when a man was standing near him. Hunger was not his motive, for he had destroyed dozens of fowls the night before. The ermine has been used successfully as a ferret. Having first filed the creature's teeth down, so that it could not kill the game, a gentleman secured twelve live rabbits in one forenoon.
"But it's getting late, and time we started tentward, and yet I'm not through even the list of quadrupeds that may have dwelt in our old tenement. There are four species of bats to be mentioned, besides moles and shrews, that would burrow in its roots if they are as hollow as the branches. There are thirteen species of birds, including several very interesting families of woodpeckers, that would live in a tree like that, not to speak of tree-toads, salamanders, brown tree-lizards, insects and slugs innumerable, and black-snakes—"
"Snakes?" interrupted Burt, incredulously.
"Yes, snakes. I once put my hand in a hole for high-holders' eggs, and a big black-snake ran down my back, but not inside of my coat, however."
"Please say nothing more about snakes," cried Amy; and she rose decisively, adding, in a low tone: "Come, Gertrude, let us go. The tenants of the old tree that we've heard about may be very interesting to naturalists, but some of them are no more to my taste than the people in the slums of London."
"You have made our blood run cold with horrors—an agreeable sensation, however, to-day," said Burt, also rising. "Your ermine out-Herods Herod. By the way, is not the fur of this pitiless beast worn by the highest dignitaries of the legal profession?" and he hastened after the girls.