The roof of the lodge sloped somewhat toward the south, thus permitting the sun's warmth to penetrate the one loose place in the mass, the muskrat's ventilating shaft. In a snug room about a foot down from the roof of the dome, and well above the water line, he had made his bed of leaves and grass, where he could sleep snugly even when the winter gales shrieked overhead and the snow drifted deep.
The muskrat, as is usual with his tribe, had two entrances to his lodge, one a tortuous passage opening under water and leading inward about a foot, then slanting upward five or six feet, the other leading to the open air, its exit cleverly concealed by a tussock of coarse grass. Here he lived a life of ease and also of adventure, feasting on sweet-flag root, rushes and lily stems, of which there was always an abundance close at hand, and taking his exercise in the water or in his many runways in the long grass bordering the stream. The muskrat had adopted the modern slogan of "Safety First" and had, in addition to his lodge, made a burrow in the bank not far away, a retreat in time of trouble.
One warm summer day the muskrat emerged from the lower entrance to his lodge. Swimming lazily across the little pool, he paused under the shade of a mass of overhanging roots where it was safe to thrust out his nose for a breath of air. Though the air of the wilderness was warm and oppressive, the water of the stream was pleasantly cooled by a number of springs. The sun shining down upon it served only to intensify the green of overhanging grass and leaves, so that the muskrat seemed to be basking in a dim green world. Gnats hovered in a thick swarm in the sunlight close above the calm surface, and a group of birches, leaning over to look at their reflection, trailed their tender green branches in the clear mirror. Occasional flecks of foam from the falls above drifted by, or a leaf fell softly, floating like a fairy boat on a sea of glass.
Lured by the peacefulness of the scene the muskrat ventured forth into the sunlight to comb his fur, about which he was extremely fastidious. He had just begun his toilet when a shadow drifted between him and the sun. Without looking upward, he plunged back into the pool, carrying with him a number of tiny bubbles of air which gleamed like silver amid his thick fur. Under the shadow of the root he lay quiet for some time, having no means of knowing that the shadow had been but that of a summer cloud drifting by overhead.