For the next four or five months they would live under ice, but they did not care about that. It was what they had planned and worked for for weeks. They were snugly housed with plenty of tender bark for their winter's food, so the wind might howl, and the frost freeze. It would only strengthen their barricade and make them more secure against the outer world.
In their thick-walled house it was quite snug. The heat of their bodies made it warm and the vent at the top carried off the foul air. Whenever they were tired of confinement, they would go for a swim in the pond through one of the three sub-marine passages, just as though the pond had not been frozen over. The only care that they needed to exercise was to look out that these holes did not ice over and thus lock them in their lodge like rats in a trap. To prevent this, they broke the ice frequently with their tails during cold days. Some cold nights they were obliged to watch the holes for hours to prevent them from freezing.
It was twilight of a bleak December day. The sun had taken his accustomed plunge behind the western horizon, but still shone blood red upon the clouds above the gray hills. There was still light enough from the afterglow to cast shadows, and phantom shapes peopled the aisles of the forest, or stretched their long arms across the fields.
The moon was just rising in the east, and it made shadows and shapes uncanny and unearthly. Already the heavens were studded with stars, and the wind moaned fitfully, rattling down snow and ice and whistling in the leafless twigs.
Down from the foothills, coming like a wary hunter, a wildcat prowled to the edge of the beavers' pond. A part of the way he had followed a rabbit's track, but it had proved so old that he had finally given it up. When he hurried he moved by quick jumps, bringing down all four feet at a time quite close together, and leaving those four telltale paw-prints in a bunch that hunters know so well. When he wanted to be more cautious, he walked cat-like, setting his fore paw down as softly as though his foot were velvet. He was an ugly looking brute, rather heavily built, with a thick head, and square topped club ears that usually lay back close to his head. His visage was generously sprinkled with whiskers, but it was accented by two hungry yellow green eyes, that seemed almost phosphorescent. His habitual expression was a snarl.
At the edge of the beaver pond, he tried the wind this way and that. His nostrils dilated, his eyes snapped fire, and his stump of a tail twitched. There was game abroad. He knew that scent of old. It was quite common away to the north from whence he had wandered. Cautiously he crept forward, putting down his paws in the dainty cat-like manner; but he must have known that the beavers were out of his reach at this time of year. Perhaps his hunger made him forgetful or he may have looked for the unexpected.
Half-way across the pond he stopped and sniffed again; it was close at hand now. Then he noticed the conical house on the island near, and crept cautiously toward it. Twice he walked about the house, which was now partly covered with snow, then with one jump he landed upon the very dome of the beavers' dwelling and peeked in at the air hole. What he saw made saliva drip from his mouth and his eyes dilate. There within three feet of his death-dealing paws were a pair of sleek beavers, warm and cozy. The hot scent fairly ravished his nostrils. It was unendurable, and he tore at the frozen mud house like a fury, first with his fore paws, then with his powerful hind paws armed with one of the best set of claws in the New England woods. But it was as hard as a stone wall and the beavers might just as well have been miles away as far as he was concerned.
Then the wildcat peeked in again, and ungovernable rage seized him. He reared upon his haunches, and beat the air with his fore paws and howled and shrieked like a demon. The beavers started from their twilight nap with sudden terror. This fury that was tearing at their house and filling the night with awful sounds seemed almost upon their very backs, so they fled precipitately through the water passages into the pond and took refuge in one of the burrows along the bank.