and the marvellous clarity of the sunset yellow of their heads, shading to twilight down their backs, to black night on their wings, barred by a strip of clear white moonlight. They agreed that these were most unusual-looking creatures. How unusual any naturalist would have been glad to tell them; for these were that great and prized rarity, the Evening Grosbeak. So, too, in the pine woods they were showered by bits of cones, and looked aloft to make out a distant little bird busily engaged in tearing the cones to pieces. They laughed at his industry, but would have been immensely interested could they have examined at close hand the Crossbill's beak and its singular adaption to just this task. And of course they remarked the stately deliberate-looking prints of the grouse; and the herded tramping of the quail. The winter was populous enough, in spite of its rigour. Some of its many creatures the boys knew; many more they did not; but you may be sure they saw all that did not exercise the closest circumspection. For miles about, the little sleigh explored the country: main-road, worn smooth by countless farmer-sleighs; by-roads, through which the pony had to wallow belly-deep, making a new track. Not the mere pleasure of driving lured them out--that amounted to little after the week of novelty--but something of the spirit of exploration was in it. Duke always accompanied them, plunging powerfully through the deepest drifts, exulting in the snow, rolling in it, frisking in it in all directions, racing down the road and back, glad to be alive and warm this freezing weather. One day in a patch of woods he came to an abrupt halt. The boys, watching, saw his eye fixed, his upper lip snarl back the least in the world, his tail stiffen except at its quivering tip, his whole body lengthen and half-crouch and turn rigid. And as the sleigh wallowed near him, suddenly, with an immense scattering of snow and a startling roar, an old cock-partridge burst from beneath the surface of the snow and hurtled away through the frozen trees.