Spinning round, her shaking pistol raised, she confronted the monster, who was growling and tearing at the clothing in his hand. Again he crouched to spring, and she pressed the trigger. The unexpected loudness of the explosion so startled her that she nearly dropped the pistol. With a howl of anguish he fell, gripping at his wounded shoulder, but rose again immediately. And then he began to move backward, watching her all the time. What should she do? In her present position he might creep from bush to bush and pounce upon her at any moment. She looked up at the tower. If she could reach the top! And then she remembered the ladder that Jack Knebworth had left behind. But that would have been collected. She moved stealthily, keeping her eye upon the ape, and though he was motionless, she knew he was watching her. Then, groping in the grass, her fingers touched the light ladder, and she lifted it without difficulty and placed it against the wall. She had heard Jack say that the ape could not have climbed the tower from the outside without assistance, though it had been an easy matter, with the aid of the trees growing against the wall inside, for him to get out. Bhag was still visible; the dull glow of his eyes was dreadful to see. With a wild run she reached the top of the ladder and began pulling it up after her. Bhag crept nearer and nearer till he came to the foot of the tower, made three ineffectual efforts to scale the wall and failed. She heard his twitter of rage, and guided the ladder to the inside of the tower. For a long time they sat, looking at one another, the orang-outang and the girl. And then Bhag crept away. She followed him as far as her keen eyes could distinguish his ungainly shape, waiting until she was certain he had gone, and then reached for the ladder. The lower rung must have caught in one of the bushes below. She tugged, tugged again, tugged for the third time, and it came away so smoothly that she lost her balance. For a second she was holding the top of the wall with one hand, the ladder with the other; then, half-sliding, half-tumbling, she came down with a run, and picked herself up breathless. She could have laughed at the mishap but for the eerie loneliness of her new surroundings. She tried to erect the ladder again, but in the dark it was impossible to get a firm foundation. There must be small stones somewhere about, and she began to look out for them. She reached the bottom of the circular depression, and pushing aside a bush to make further progress, feeling all the time with her feet for a suitable prop, suddenly she slipped. She was dropping down a sloping shaft into the depths of the earth! CHAPTER XXXVIII THE CAVERN OF BONES