Entering the woods, the number and variety of the tracks contrast strongly with the rigid, frozen aspect of things. Warm jets of life still shoot and play amid this snowy desolation. Fox-tracks are far less numerous than in the fields; but those of hares, skunks, partridges, squirrels, and mice abound. The mice-tracks are very pretty, and look like a sort of fantastic stitching on the coverlid of the snow. One is curious to know what brings these tiny creatures from their retreats; they do not seem to be in quest of food, but rather to be travelling about for pleasure or sociability, though always going post-haste, and linking stump with stump and tree with tree by fine, hurried strides. That is when they travel openly; but they have hidden passages and winding galleries under the snow, which undoubtedly are their main avenues of communication. Here and there these passages rise so near the surface as to be covered by only a frail arch of snow, and a slight ridge betrays their course to the eye. I know him well. He is known to the farmer as the deer-mouse, to the naturalist as the _Hesperomys leucopus_,--a very beautiful creature, nocturnal in his habits, with large ears, and large, fine eyes, full of a wild, harmless look. He leaps like a rabbit, and is daintily marked, with white feet and a white belly. It is he who, far up in the hollow trunk of some tree, lays by a store of beech-nuts for winter use. Every nut is carefully shelled, and the cavity that serves as storehouse lined with grass and leaves. The wood-chopper frequently squanders this precious store. I have seen half a peck taken from one tree, as clean and white as if put up by the most delicate hands,--as they were. How long it must have taken the little creature to collect this quantity, to hull them one by one, and convey them up to his fifth-story chamber! He is not confined to the woods, but is quite as common in the fields, particularly in the fall, amid the corn and potatoes. When routed by the plough, I have seen the old one take flight with half a dozen young hanging to her teats, and with such reckless speed, that some of the young would lose their hold, and fly off amid the weeds. Taking refuge in a stump with the rest of her family, the anxious mother would presently come back and hunt up the missing ones.