Number Thirteen noticed that when they addressed him it was always as Bulan, and upon questioning them he discovered that they had given him this title of honor partly in view of his wonderful fighting ability and partly because the sight of his white face emerging from out of the darkness of the river into the firelight of their blazing camp fire had carried to their impressionable minds a suggestion of the tropic moon which they admired and reverenced. Both the name and the idea appealed to Number Thirteen and from that time he adopted Bulan as his rightful cognomen. The loss of time resulting from the fight in the prahu and the ensuing peace parley permitted Muda Saffir to put considerable distance between himself and his pursuers. The Malay’s boat was now alone, for of the eight prahus that remained of the original fleet it was the only one which had taken this branch of the river, the others having scurried into a smaller southerly arm after the fight upon the island, that they might the more easily escape their hideous foemen. Only Barunda, the headman, knew which channel Rajah Muda Saffir intended following, and Muda wondered why it was that the two boats that were to have borne Barunda’s men did not catch up with his. While he had left Barunda and his warriors engaged in battle with the strangers he did not for an instant imagine that they would suffer any severe loss, and that one of their boats should be captured was beyond belief. But this was precisely what had happened, and the second boat, seeing the direction taken by the enemy, had turned down stream the more surely to escape them. So it was that while Rajah Muda Saffir moved leisurely up the river toward his distant stronghold waiting for the other boats of his fleet to overtake him, Barunda, the headman, guided the white enemy swiftly after him. Barunda had discovered that it was the girl alone this white man wanted. Evidently he either knew nothing of the treasure chest lying in the bottom of Muda Saffir’s boat, or, knowing, was indifferent. In either event Barunda thought that he saw a chance to possess himself of the rich contents of the heavy box, and so served his new master with much greater enthusiasm than he had the old. Beneath the paddles of the natives and the five remaining members of his pack Bulan sped up the dark river after the single prahu with its priceless freight. Already six of the creatures of Professor Maxon’s experiments had given up their lives in the service of his daughter, and the remaining six were pushing forward through the inky blackness of the jungle night into the untracked heart of savage Borneo to rescue her from her abductors though they sacrificed their own lives in the endeavor.