About midnight Joe awoke, and called the boys. There was a brooding oppressiveness in the air that seemed to bode something. The boys huddled themselves together and sought the friendly companionship of the fire, though the dull dead heat of the breathless atmosphere was stifling. They sat still, intent and waiting. The solemn hush continued. Beyond the light of the fire everything was swallowed up in the blackness of darkness. Presently there came a quivering glow that vaguely revealed the foliage for a moment and then vanished. By and by another came, a little stronger. Then another. Then a faint moan came sighing through the branches of the forest and the boys felt a fleeting breath upon their cheeks, and shuddered with the fancy that the Spirit of the Night had gone by. There was a pause. Now a weird flash turned night into day and showed every little grassblade, separate and distinct, that grew about their feet. And it showed three white, startled faces, too. A deep peal of thunder went rolling and tumbling down the heavens and lost itself in sullen rumblings in the distance. A sweep of chilly air passed by, rustling all the leaves and snowing the flaky ashes broadcast about the fire. Another fierce glare lit up the forest and an instant crash followed that seemed to rend the treetops right over the boys' heads. They clung together in terror, in the thick gloom that followed. A few big raindrops fell pattering upon the leaves.

"Quick! boys, go for the tent!" exclaimed Tom.

They sprang away, stumbling over roots and among vines in the dark, no two plunging in the same direction. A furious blast roared through the trees, making everything sing as it went. One blinding flash after another came, and peal on peal of deafening thunder. And now a drenching rain poured down and the rising hurricane drove it in sheets along the ground. The boys cried out to each other, but the roaring wind and the booming thunderblasts drowned their voices utterly. However, one by one they straggled in at last and took shelter under the tent, cold, scared, and streaming with water; but to have company in misery seemed something to be grateful for. They could not talk, the old sail flapped so furiously, even if the other noises would have allowed them. The tempest rose higher and higher, and presently the sail tore loose from its fastenings and went winging away on the blast. The boys seized each others' hands and fled, with many tumblings and bruises, to the shelter of a great oak that stood upon the riverbank. Now the battle was at its highest. Under the ceaseless conflagration of lightning that flamed in the skies, everything below stood out in cleancut and shadowless distinctness: the bending trees, the billowy river, white with foam, the driving spray of spumeflakes, the dim outlines of the high bluffs on the other side, glimpsed through the drifting cloudrack and the slanting veil of rain. Every little while some giant tree yielded the fight and fell crashing through the younger growth; and the unflagging thunderpeals came now in ear-splitting explosive bursts, keen and sharp, and unspeakably appalling. The storm culminated in one matchless effort that seemed likely to tear the island to pieces, burn it up, drown it to the treetops, blow it away, and deafen every creature in it, all at one and the same moment. It was a wild night for homeless young heads to be out in.

But at last the battle was done, and the forces retired with weaker and weaker threatenings and grumblings, and peace resumed her sway. The boys went back to camp, a good deal awed; but they found there was still something to be thankful for, because the great sycamore, the shelter of their beds, was a ruin, now, blasted by the lightnings, and they were not under it when the catastrophe happened.