The brook too had altered in character. A trembling radiance came up from its green water, like some imprisoned force escaping into the air. He had not walked in it for some time; now he did so, to test its quality. He felt new life entering his body, from his feet upward; it resembled a slowly moving cordial, rather than mere heat. The sensation was quite new in his experience, yet he knew by instinct what it was. The energy emitted by the brook was ascending his body neither as friend nor foe but simply because it happened to be the direct road to its objective elsewhere. But, although it had no hostile intentions, it was likely to prove a rough traveller—he was clearly conscious that its passage through his body threatened to bring about some physical transformation, unless he could do something to prevent it. Leaping quickly out of the water, he leaned against a rock, tightened his muscles, and braced himself against the impending change. At that very moment the blurring again attacked his sight, and, while he was guarding against that, his forehead sprouted out into a galaxy of new eyes. He put his hand up and counted six, in addition to his old ones. The danger was past and Maskull laughed, congratulating himself on having got off so easily. Then he wondered what the new organs were for—whether they were a good or a bad thing. He had not taken a dozen steps up the ravine before he found out. Just as he was in the act of jumping down from the top of a boulder, his vision altered and he came to an automatic standstill. He was perceiving two worlds simultaneously. With his own eyes he saw the gorge as before, with its rocks, brook, plant-animals, sunshine, and shadows. But with his acquired eyes he saw differently. All the details of the valley were visible, but the light seemed turned down, and everything appeared faint, hard, and uncoloured. The sun was obscured by masses of cloud which filled the whole sky. This vapour was in violent and almost living motion. It was thick in extension, but thin in texture; some parts, however, were far denser than others, as the particles were crushed together or swept apart by the motion. The green sparks from the brook, when closely watched, could be distinguished individually, each one wavering up toward the clouds, but the moment they got within them a fearful struggle seemed to begin. The spark endeavoured to escape through to the upper air, while the clouds concentrated around it whichever way it darted, trying to create so dense a prison that further movement would be impossible. As far as Maskull could detect, most of the sparks succeeded eventually in finding their way out after frantic efforts; but one that he was looking at was caught, and what happened was this. A complete ring of cloud surrounded it, and, in spite of its furious leaps and flashes in all directions—as if it were a live, savage creature caught in a net—nowhere could it find