The lepers obeyed, crawling away to their lairs in the cliff, until only Koolau remained, sitting motionless in the moonlight, his rifle across his knees, as he gazed far down to the boats landing on the beach. The far head of Kalalau Valley had been well chosen as a refuge. Except Kiloliana, who knew back-trails up the precipitous walls, no man could win to the gorge save by advancing across a knife-edged ridge. This passage was a hundred yards in length. At best, it was a scant twelve inches wide. On either side yawned the abyss. A slip, and to right or left the man would fall to his death. But once across he would find himself in an earthly paradise. A sea of vegetation laved the landscape, pouring its green billows from wall to wall, dripping from the cliff-lips in great vine-masses, and flinging a spray of ferns and air-plants in to the multitudinous crevices. During the many months of Koolau's rule, he and his followers had fought with this vegetable sea. The choking jungle, with its riot of blossoms, had been driven back from the bananas, oranges, and mangoes that grew wild. In little clearings grew the wild arrowroot; on stone terraces, filled with soil scrapings, were the _taro_ patches and the melons; and in every open space where the sunshine penetrated were _papaia_ trees burdened with their golden fruit. Koolau had been driven to this refuge from the lower valley by the beach. And if he were driven from it in turn, he knew of gorges among the jumbled peaks of the inner fastnesses where he could lead his subjects and live. And now he lay with his rifle beside him, peering down through a tangled screen of foliage at the soldiers on the beach. He noted that they had large guns with them, from which the sunshine flashed as from mirrors. The knife-edged passage lay directly before him. Crawling upward along the trail that led to it he could see tiny specks of men. He knew they were not the soldiers, but the police. When they failed, then the soldiers would enter the game. He affectionately rubbed a twisted hand along his rifle barrel and made sure that the sights were clean. He had learned to shoot as a wild-cattle hunter on Niihau, and on that island his skill as a marksman was unforgotten. As the toiling specks of men grew nearer and larger, he estimated the range, judged the deflection of the wind that swept at right angles across the line of fire, and calculated the chances of overshooting marks that were so far below his level. But he did not shoot. Not until they reached the beginning of the passage did he make his presence known. He did not disclose himself, but spoke from the thicket. "What do you want?" he demanded. "We want Koolau, the leper," answered the man who led the native police, himself a blue-eyed American. "You must go back," Koolau said.