Instantly pandemonium broke loose upon the deck. The apes of Akut, terrified by the sound, ran hither and thither, snarling and growling. Sheeta leaped here and there, screaming out his startled terror in hideous cries that sent the ice of fear straight to the hearts of the Kincaid’s crew. Mugambi, too, was trembling. Only Tarzan of the Apes and his wife retained their composure. Scarce had the debris settled than the ape-man was among the beasts, quieting their fears, talking to them in low, pacific tones, stroking their shaggy bodies, and assuring them, as only he could, that the immediate danger was over. An examination of the wreckage showed that their greatest danger, now, lay in fire, for the flames were licking hungrily at the splintered wood of the wrecked cabin, and had already found a foothold upon the lower deck through a great jagged hole which the explosion had opened. By a miracle no member of the ship’s company had been injured by the blast, the origin of which remained for ever a total mystery to all but one—the sailor who knew that Paulvitch had been aboard the Kincaid and in his cabin the previous night. He guessed the truth; but discretion sealed his lips. It would, doubtless, fare none too well for the man who had permitted the arch enemy of them all aboard the ship in the watches of the night, where later he might set an infernal machine to blow them all to kingdom come. No, the man decided that he would keep this knowledge to himself. As the flames gained headway it became apparent to Tarzan that whatever had caused the explosion had scattered some highly inflammable substance upon the surrounding woodwork, for the water which they poured in from the pump seemed rather to spread than to extinguish the blaze. Fifteen minutes after the explosion great, black clouds of smoke were rising from the hold of the doomed vessel. The flames had reached the engine-room, and the ship no longer moved toward the shore. Her fate was as certain as though the waters had already closed above her charred and smoking remains. “It is useless to remain aboard her longer,” remarked the ape-man to the mate. “There is no telling but there may be other explosions, and as we cannot hope to save her, the safest thing which we can do is to take to the boats without further loss of time and make land.” Nor was there other alternative. Only the sailors could bring away any belongings, for the fire, which had not yet reached the forecastle, had consumed all in the vicinity of the cabin which the explosion had not destroyed.