The dwarf had need of his bright eyes and his skilful hands; for the soft, tiny foot intrusted to him was a mere baby, that had to find its way through a strange, dark world; and, what was more, it must not only be guided, but also fed and tended carefully: so the bright eyes go before, and the brown fingers dig out a roadway, and the foot that has learned to trust its guide utterly follows on. There is no longer any danger: he runs against no rocks; he loses his way among no tangled roots; and the hard earth seems to open gently before him, leading him to the fields where his own best food lies, and to hidden springs of sweet, fresh water. Do you wonder when I say the foot must be fed? Aren't your feet fed? To be sure, your feet have no mouths of their own; but doesn't the mouth in your face eat for your whole body, hands and feet, ears and eyes, and all the rest? else how do they grow? The only difference here between you and Alba is, that his foot has mouths of its own, and as it wanders on through the earth, and finds any thing good for food, eats both for itself and for the rest of the body; for I must tell you, that, as the little foot progresses, it does not take the body with it, but only grows longer and longer and longer, until, while one end remains at home fastened to the body, the other end has travelled a distance, such as would be counted miles by the atoms of people who live in the under- world. And, moreover, the foot no longer goes on alone: others have come by tens, even by hundreds, to join it; and Alba begins to understand what the dwarf meant by thousands. Thus the feet travel on, running some to this side, some to that; here digging through a bed of clay, and there burying themselves in a soft sand-hill, taking a mouthful of carbon here, and of nitrogen there. But what are these two strange articles of food? Nothing at all like bread and butter, you think. Different, indeed, they seem; but you will one day learn that bread and butter are made in part of these very same things, and they are just as useful to Alba as your breakfast, dinner, and supper are to you. For just as bread and butter, and other food, build your body, so carbon and nitrogen are going to build his; and you will presently see what a fine, large, strong body they can make. Then, perhaps, you will be better able to understand what they are. Shall we leave the feet to travel their own way for a while, and see where the fairy has led the little hand? QUERCUS ALBA'S NEW SIGHT OF THE UPPER-WORLD