And let me not leave out the moon--for surely there must be a moon, the full, incredibly clear disc that goes so well with Russian lusty frosts. So there it comes, steering out of a flock of small dappled clouds, which it tinges with a vague iridescence; and, as it sails higher, it glazes the runner tracks left on the road, where every sparkling lump of snow is emphasized by a swollen shadow.