In previous years I had often gone prospecting over some bare hillside, where a pitch pine wood had formerly stood, and got out the fat pine roots. They are almost indestructible. Stumps thirty or forty years old, at least, will still be sound at the core, though the sapwood has all become vegetable mould, as appears by the scales of the thick bark forming a ring level with the earth four or five inches distant from the heart. With axe and shovel you explore this mine, and follow the marrowy store, yellow as beef tallow, or as if you had struck on a vein of gold, deep into the earth. But commonly I kindled my fire with the dry leaves of the forest, which I had stored up in my shed before the snow came. Green hickory finely split makes the woodchopper's kindlings, when he has a camp in the woods. Once in a while I got a little of this. When the villagers were lighting their fires beyond the horizon, I too gave notice to the various wild inhabitants of Walden vale, by a smoky streamer from my chimney, that I was awake.--

Light-winged Smoke, Icarian bird,
Melting thy pinions in thy upward flight,
Lark without song, and messenger of dawn,
Circling above the hamlets as thy nest;
Or else, departing dream, and shadowy form
Of midnight vision, gathering up thy skirts;
By night star-veiling, and by day
Darkening the light and blotting out the sun;
Go thou my incense upward from this hearth,
And ask the gods to pardon this clear flame.

Hard green wood just cut, though I used but little of that, answered my purpose better than any other. I sometimes left a good fire when I went to take a walk in a winter afternoon; and when I returned, three or four hours afterward, it would be still alive and glowing. My house was not empty though I was gone. It was as if I had left a cheerful housekeeper behind. It was I and Fire that lived there; and commonly my housekeeper proved trustworthy. One day, however, as I was splitting wood, I thought that I would just look in at the window and see if the house was not on fire; it was the only time I remember to have been particularly anxious on this score; so I looked and saw that a spark had caught my bed, and I went in and extinguished it when it had burned a place as big as my hand. But my house occupied so sunny and sheltered a position, and its roof was so low, that I could afford to let the fire go out in the middle of almost any winter day. The moles nested in my cellar, nibbling every third potato, and making a snug bed even there of some hair left after plastering and of brown paper; for even the wildest animals love comfort and warmth as well as man, and they survive the winter only because they are so careful to secure them. Some of my friends spoke as if I was coming to the woods on purpose to freeze myself. The animal merely makes a bed, which he warms with his body, in a sheltered place; but man, having discovered fire, boxes up some air in a spacious apartment, and warms that, instead of robbing himself, makes that his bed, in which he can move about divested of more cumbrous clothing, maintain a kind of summer in the midst of winter, and by means of windows even admit the light, and with a lamp lengthen out the day.