The glittering sea rose up, moved apart in planes of blatant impossibility; the coral reef and the few stunted palms that clung to the more elevated parts would float up into the sky, would quiver, be plucked apart, run like raindrops on a wire or be repeated as in an odd succession of mirrors. Sometimes land loomed where there was no land and flicked out like a bubble. All this learnedly as a "mirage"; and since no one could reach even the reef over the stretch of water where the snapping sharks waited, they grew accustomed to these mysteries and ignored them, just as they ignored the miraculous, throbbing stars. At midday the illusions merged into the sky and there the sun gazed down like an angry eye. Then, at the end of the afternoon; the mirage subsided and the horizon became level and blue and clipped as the sun declined. That was another time of comparative coolness but menaced by the coming of the dark. When the sun sank, darkness dropped on the island like an extinguisher and soon the shelters were full of restlessness, under the remote stars. Smoke was rising here and there among the creepers that festooned the dead or dying trees. As they watched, a flash of fire appeared at the root of one wisp, and then the smoke thickened. Small flames stirred at the trunk of a tree and crawled away through leaves and brushwood, dividing and increasing. One patch touched a tree trunk and scrambled up like a bright squirrel. The smoke increased, sifted, rolled outwards. The squirrel leapt on the wings of the wind and clung to another standing tree, eating downwards. Beneath the dark canopy of leaves and smoke the fire laid hold on the forest and began to gnaw. Acres of black and yellow smoke rolled steadily toward the sea. At the sight of the flames and the irresistible course of the fire, the boys broke into shrill, excited cheering. The flames, as though they were a kind of wild life, crept as a jaguar creeps on its belly toward a line of birch-like saplings that fledged an outcrop of the pink rock. They flapped at the first of the trees, and the branches grew a brief foliage of fire. The heart of flame leapt nimbly across the gap between the trees and then went swinging and flaring along the whole row of them. Beneath the capering boys a quarter of a mile square of forest was savage with smoke and flame. The separate noises of the fire merged into a drum-roll that seemed to shake the mountain. There were only a few more yards of stony ground and then the two sides of the island came almost together so that one expected a peak of headland. But instead of this a narrow ledge of rock, a few yards wide and perhaps fifteen long, continued the island out into the sea. There lay another of those pieces of pink squareness that underlay the structure of the island. This side of the castle, perhaps a hundred feet high, was the pink bastion they had seen from the mountain-top. The rock of the cliff was split and the top littered with great lumps that seemed to totter.
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