The days were nearing the shortest of the year, when, in these latitudes, the sun does but show himself and withdraw again. But, especially in very cold weather, which is nearly always very clear weather, that brief appearance is preceded by a feast of rich, delicate colour. First a greenish glow on the southern horizon, brightening into lemon and then into clear primrose, invades the deep purple of the starry heavens. Then a beautiful circle of blush pink above a circle of pure amethyst gradually stretches all around the edge of the sky, slowly brightening while the stars fade out and the heavens change to blue. The dead white mirror of the snow takes every tint that the skies display with a faint but exquisite radiance. Then the sun's disk appears with a flood of yellow light but with no appreciable warmth, and for a little space his level rays shoot out and gild the tree tops and the distant hills. The snow springs to life. Dead white no longer, its dry, crystalline particles glitter in myriads of diamond facets with every colour of the prism. Then the sun is gone, and the lovely circle of rose pink over amethyst again stretches round the horizon, slowly fading until once more the pale primrose glows in the south against the purple sky with its silver stars. Thus sunrise and sunset form a continuous spectacle, with a purity of delicate yet splendid colour that only perfectly dry atmosphere permits. The primrose glow, the heralding circle, the ball of orange light, the valedictory circle, the primrose glow again, and a day has come and gone. Air can hold no moisture at all at these low temperatures, and the skies are cloudless. [Sidenote: AN ESCAPADE ON THE YUKON]