A singular illustration of this was afforded to Lucien, who remained at the camp while the rest went out hunting. He had gathered some of the leaves of the Labrador tea, and was drying them over the coals, intending to cheer his comrades with a cup of this beverage after supper. The hare-soup was boiling, and the “cook” sat listening to the cheerful sounds that issued from the pot—now and then taking off the lid to examine its savoury contents, and give them a stir. He would then direct his attention to the tea-leaves that were parching in the frying-pan; and, having shifted them a little, felt himself at liberty to look about for a minute or two.
On one of these occasions, while glancing up, his attention was attracted to an object which appeared upon the snow at a short distance from where he sat. A wreath of snow, that had formed under the shelter of the hill, extended all around its base, presenting a steep front in every direction. This front was only two or three feet in height; but the top surface of the wreath was many yards wide—in fact, it extended back until it became blended with the slope of the hill. It was smooth and nearly level, but the hill above was steep, and somewhat rough and rocky. The steep front of the wreath came down within half-a-dozen paces of the fire where Lucien was seated; and it was upon the top or scarpment of it that the object appeared that had drawn his attention. It was a small creature, but it was in motion, and thus had caught his eye.
A single glance showed him that the little animal was a mouse, but of a somewhat singular species. It was about the size of the common mouse, but quite different in colour. The upper half of its body was of a light mahogany tint, while the lower half, including the legs and feet, were of a milky whiteness. It was, in fact, the “white-footed mouse” (Mus leucopus), one of the most beautiful of its kind.
Here and there above the surface of the snow protruded the tops of arbutus-trees; and the little creature was passing from one of these to the other, in search, no doubt, of the berries that remain upon these trees all the winter. Sometimes it ran from point to point like any other mouse, but now and then it would rear itself on its hind-legs, and leap several feet at a single bound! In this it evidently assisted itself by pressing its tail—in which it possesses muscular power—against the snow. This peculiar mode of progression has obtained for it the name of the “jumping mouse,” and among the Indians “deer”-mouse, because its leap reminds them of the bounding spring of the deer. But there are still other species of “jumping mice” in America that possess this power to a greater degree even than the Mus leucopus.
Lucien watched its motions without attempting to interfere with it, until it had got nearly out of sight. He did not desire to do injury to the little creature, nor was he curious to obtain it, as he had already met with many specimens, and examined them to his satisfaction. He had ceased to think of it, and would, perhaps, never have thought of it again, but, upon turning his eyes in the opposite direction, he observed another animal upon the snow. This creature had a far different aspect from the mouse. Its body was nearly a foot in length, although not much thicker than that of the other! Its legs were short, but strong, and its forehead broad and arched convexly. It had a tail more than half the length of the body, hairy, and tapering like that of a cat. Its form was the well-known form of the weasel, and it was, in fact, a species of weasel. It was the celebrated ermine (Mustela erminea), celebrated for its soft and beautiful fur, so long prized as an ornament for the robes of the rich. It was white all over, with the exception of its tail; and that, for about an inch or so at the tip, was covered with black silky hair. On some parts of the body, too, the white was tinged with a primrose yellow; but this tinge is not found in all animals of this species, as some individuals are pure white. Of course it was now in its winter “robes;” but in the summer it changes to a colour that does not differ much from that of the common weasel.
When Lucien first saw it, it was running along the top of the wreath, and coming from the same direction from which the mouse had come. Now and then it paused awhile, and then ran on again. Lucien observed that it kept its nose to the ground, and as it drew nearer he saw that it was following on the same path which the other had taken. To his astonishment he perceived that it was trailing the mouse! Wherever the latter had doubled or made a détour, the ermine followed the track; and where the mouse had given one of its long leaps, there the ermine would stop, and, after beating about until it struck the trail again, would resume its onward course at a gallop. Its manoeuvres were exactly like those of a hound upon the fresh trail of a fox!
Lucien now looked abroad to discover the mouse. It was still in sight far off upon the snow, and, as Lucien could see, busily gnawing at the arbutus, quite unconscious that its greatest enemy was so near. I say greatest enemy, for the Mus leucopus is the natural prey of the Mustela erminea.
The mouse was soon made aware of the dangerous proximity, but not until the ermine had got within a few feet of it. When it perceived the latter it shrunk, at first, among the leaves of the arbutus; but seeing there would be no protection there—as the other was still springing forward to seize it—it leaped up, and endeavoured to escape by flight. Its flight appeared to be in alternate jumps and runs, but the chase was not a long one. The ermine was as active as a cat, and, after a few skips, its claws were struck into the mouse. There was a short, slender squeak, and then a “crunch,” like the cracking of a hazel-nut. This last sound was produced by the teeth of the ermine breaking through the skull of its victim.