Dusk had fallen like a gray mantle upon the wilderness when the beavers began their work. Ahmeek selected a poplar to his liking, not far from the bank of the stream. Grasping the trunk with his hand-like paws and turning his head to one side in order to bring his great cutting teeth into play, he bit out a huge chunk, following it with another and another until the tree swayed and crashed to the ground. Then both beavers set to work to strip it of branches and lay the foundations for the dam.

The dam, when finished, was a work worthy of a trained engineer. The twigs and trunks of trees Ahmeek and his mate laid lengthwise with the current. On the upper face, where the force of the water would but drive it the more tightly, the mass was plastered and bound together with a cement of mud and stones, which in the freezing days of winter would become impenetrable. Here again the beavers showed their wisdom by leaving several low places over which the water could trickle, thus relieving the pressure that otherwise would have broken the dam. Now the stream overflowed its low banks, making a deep pond, soon to become the home of pickerel and trout and of a great colony of water-lilies, a delicacy for the beaver larder.

The next work was the construction of the lodge, a hollow mound of mud, sticks and stones twelve feet in width and four in height, within which was a dry room, its floor safely above the high-water mark. Two passages led to this room, one straight, for carrying food, the other winding. The main entrance was cleverly concealed beneath the roots of a great tree which had fallen across the stream.

Ahmeek and his mate were soon joined by other beavers, pioneers from farther south, who, finding the spot to their liking, decided to establish a colony. As with the human pioneers, there was a great felling of trees and hours of heavy labor before the dwellings were finished and the various families ensconced in their snug homes.

That first winter in the new colony was uneventful and when the ice broke up in the spring the beaver city was swarming with sleek brown youngsters who, while learning the serious business of life, found time to indulge in play just as do the children of their human neighbors. At twilight one after another would appear upon the bank, where he would make his toilet, combing his thick, chestnut brown fur until it shone like satin. No beaver is untidy about his dress.

Among the young beavers there was one who from the first took the lead. Born in the lodge of old Ahmeek, king of the beavers, he showed every indication of following in the footsteps of his father. He it was who led the others in their frolic in the pond and upon the banks, and when the sharp slap of a tail upon the water told of danger, none was more quick to obey its warning.

The young beavers did not spend all their time in play. The dam constantly needed repair; wood must be cut and stored at the bottom of the pond, so that the colony might have food through the winter. At this work Flat Tail, son of Ahmeek, laboured manfully. His teeth were not yet long and sharp enough for felling trees, but they could cut off the smaller branches. Flat Tail was very proud when he could swim back to the lodge with one of these branches over his shoulder, kept in place by his fore-paws held close to his body.

One day toward the end of the summer Flat Tail had a narrow escape. He was sitting on the bank, combing his glossy brown fur, of which he was very proud, when a prowling panther discovered him. The big cat's mouth watered, for beaver at all times is a delicate morsel for the flesh-eating animals. The green eyes narrowed to mere slits as, silent as a shadow, the panther climbed a tree and made its way out to a point from which a straight drop would land it upon its unsuspecting quarry. In another moment Flat Tail, intent upon his toilet and oblivious of his danger, would undoubtedly have furnished a meal for the panther had not old Ahmeek appeared, swimming upward from the lodge. Immediately his keen eyes discovered the crouching animal and, with a sound like the crack of a rifle, his flat, horny tail descended upon the water.