The next summer a house was built in the lily pads near the shore. Here a number of children were born during the few tranquil years that followed. These times came to an end one bright midsummer day. Lord Dunraven had a ditch cut in the outlet rim of the lake with the intention of draining it that his fish ponds, several miles below in his Estes Park game-preserve, might have water. A drouth had prevailed for several months, and a new water-supply must be had or the fish ponds would go dry. The water poured forth through the ditch, and the days of the colony appeared to be numbered. A beaver must have water for safety and for the ease of movement of himself and his supplies. He is skillful in maintaining a dam and in regulating the water-supply; these two things require much of his time. In Lily Lake the dam and the water question had been so nicely controlled by nature that with these the colonists had had nothing to do. However, they still knew how to build dams, and water-control had not become a lost art. The morning after the completion of the drainage ditch, a man was sent up to the lake to find out why the water was not coming down. A short time after the ditch-diggers had departed, the lowering water had aroused the beaver, who had promptly placed a dam in the mouth of the ditch. The man removed this dam and went down to report. The beaver speedily replaced it. Thrice did the man return and destroy their dam, but thrice did the beaver promptly restore it. The dam-material used in obstructing the ditch consisted chiefly of the peeled sticks from which the beaver had eaten the bark in winter; along with these were mud and grass. The fourth time that the ditch guard returned, he threw away all the material in the dam and then set some steel traps in the water by the mouth of the ditch. The first two beaver who came to reblockade the ditch were caught in these traps and drowned while struggling to free themselves. Other beaver heroically continued the work that these had begun. The cutting down of saplings and the procuring of new material made their work slow, very slow, in the face of the swiftly escaping water; when the ditch was at last obstructed, a part of the material which formed this new dam consisted of the traps and the dead bodies of the two beaver who had bravely perished while trying to save the colony. [Illustration: HOUSE IN LILY LAKE] The ditch guard returned with a rifle, and came to stay. The first beaver to come within range was shot. The guard again removed the dam, made a fire about twenty feet from the ditch, and planned to spend the night on guard, rifle in hand. Toward morning he became drowsy, sat down by the fire, heard the air in the pines at his back, watched the star-sown water, and finally fell asleep. While he thus slept, with his rifle across his lap, the beaver placed another--their last--obstruction before the outrushing water.