He recognized the clump of trees under which we were standing, the grouping of the woods, the color of the water, the turrets of the chateau, the details, the distance, in fact every part of the prospect which we looked on for the first time. We were mere children; I, at any rate, who was but thirteen; Louis, at fifteen, might have the precocity of genius, but at that time we were incapable of falsehood in the most trivial matters of our life as friends. Indeed, if Lambert's powerful mind had any presentiment of the importance of such facts, he was far from appreciating their whole bearing; and he was quite astonished by this incident. I asked him if he had not perhaps been brought to Rochambeau in his infancy, and my question struck him; but after thinking it over, he answered in the negative. This incident, analogous to what may be known of the phenomena of sleep in several persons, will illustrate the beginnings of Lambert's line of talent; he took it, in fact, as the basis of a whole system, using a fragment--as Cuvier did in another branch of inquiry--as a clue to the reconstruction of a complete system. At this moment we were sitting together on an old oak-stump, and after a few minutes' reflection, Louis said to me: "If the landscape did not come to me--which it is absurd to imagine--I must have come here. If I was here while I was asleep in my cubicle, does not that constitute a complete severance of my body and my inner being? Does it not prove some inscrutable locomotive faculty in the spirit with effects resembling those of locomotion in the body? Well, then, if my spirit and my body can be severed during sleep, why should I not insist on their separating in the same way while I am awake? I see no half-way mean between the two propositions. "But if we go further into details: either the facts are due to the action of a faculty which brings out a second being to whom my body is merely a husk, since I was in my cell, and yet I saw the landscape--and this upsets many systems; or the facts took place either in some nerve centre, of which the name is yet to be discovered, where our feelings dwell and move; or else in the cerebral centre, where ideas are formed. This last hypothesis gives rise to some strange questions. I walked, I saw, I heard. Motion is inconceivable but in space, sound acts only at certain angles or on surfaces, color is caused only by light. If, in the dark, with my eyes shut, I saw, in myself, colored objects; if I heard sounds in the most perfect silence and without the conditions requisite for the production of sound; if without stirring I traversed wide tracts of space, there must be inner faculties independent of the external laws of physics. Material nature must be penetrable by the spirit.