Bob could bear the suspense no longer. Between himself and the figure stood one slender sapling, an accident of growth. With heart wildly beating, he stole out and tiptoed towards this fragile cover. He reached it just as a stronger gust swept through the plantation, and at the same moment a sudden beam shot from beneath a cloud and filtered wanly through the tree-tops. The figure swayed more violently; the clink-clink became the rattle of chains; and in the moonlight Bob saw with horror, but at the same time with unspeakable relief, that the form was a human skeleton, chained upright to a post.

He remembered what Ah-Sam had learnt in the inn. This no doubt was some hapless wretch who had been caught wandering on the spot and chained there, with who could tell what accompaniment of cruelty, to die of starvation or exhaustion. Grim reminder to Bob of what his own fate would be if he fell into the hands of this Wild Man of the Hills; of what perhaps Kobo's fate had already been! For a moment he paused, surveying the grisly object. "Poor wretch!" he murmured. Then with lips resolutely set he pursued his way.

Keeping as nearly as he could judge a course parallel with the edge of the ravine, he crossed the clearing and plunged into the firs on the other side. In a few minutes the copse thinned, then came to an end; there was nothing but open country, rough, but clear of trees, between him and the fort. The ravine, he thought, must be about five hundred yards on his right. In that direction, where the ground sloped down to the edge, he saw a low hut; a similar building lay at almost equal distance on his left. Were they the huts of sentries? he wondered. He waited at the edge of the copse. From the hut on the right came no sign, but on the left he saw in the moonlight a figure emerge from behind the building and walk slowly towards him. Bob stood motionless. Surely he had not been seen? No, the man approached but a few steps, then returned and disappeared.

Bob's pulse had resumed its natural beat; he felt cold and strangely tired, but the suspense, the uncertainty, the eeriness of waiting for he knew not what, had gone. All his senses, all his intelligence, were bent towards the fulfilment of his purpose. He must go on, whatever the risk. Waiting for the moon once more to ride behind a cloud, he stole forward between the huts. For a quarter of a mile all was dark, then a gleam shot forth; he dropped to the ground and lay still. He waited long, turning on his side to watch the black clouds scudding overhead. At last the moon was again obscured; again he stole forward, and he had come within an arrow's flight of the fort, and was hidden from the huts by a dip in the ground, before the moon reappeared.

He could now take a leisurely view of this face of the stronghold, bathed and blanched as it was by the moonbeams. Two figures were moving up and down upon the wall, two others on the top of the flanking tower to his left. He saw the opening, black and ominous, of the fort's only gateway. Here and there around him the grass was blackened as if by a temporary encampment. If he moved, his light clothes would show against these dark patches. He wondered whether it would not almost be safer if, avoiding them, he should continue his progress only when the moon shone.

He still lay watching, vainly trying to imagine some means of entering the fort, when he heard the clang of arms, then a great creaking and groaning. Hardly daring to peer over the brim of the hollow in which he lay, he saw the huge gate swung open outwards. Even as the thought struck him that this was surely an unusual incident at such a time of night, a man on horseback came out, set his horse to a fast trot, and clattered by within a hundred yards of Bob's position. He flattened himself against the ground and held his breath; he felt the tremor of the earth under the horses' hoofs; he heard his heart beating. But the horseman did not slacken his pace; the clatter became fainter. Again there was a groaning and creaking, and the great gate clanged to. All was silent.

For a full hour Bob lay there, while the light of the moon came and went, vainly endeavouring to think out a means of accomplishing his ends. It seemed to him that he had come in truth on a wild-goose chase. The walls of the fort rose sheer from the ground to a height of at least twenty feet, smooth, regular, with not a foothold from base to crown. He could not hope to scale them. Even if he could do so, what chance had he of finding Kobo? He must himself be instantly discovered. The walls were out of the question. What of the gateway? As he had just seen, the massive gate was shut at night; no doubt it was closely guarded by day. Supposing an opportunity offered of slipping in in disguise, how could he make use of it? He knew nothing of the language. He would gain admittance only to be detected, arrested, and despatched.

Thus all his puzzling was in vain. At length, with a feeling of despair, he rose during a temporary darkening of the moon, and made his stealthy way back towards the patch of firs. He groped his way through, shuddering as he heard the clinking of the chained figure, emerged on the opposite side, and finding the three trees he had chosen as his landmark, safely reached the edge of the ravine. There he waited. The moon had sunk behind the distant hills; in the darkness he would run the risk of alarming his enemies if he attempted to descend, for this side of the ravine was steep, as he knew, and he could not get down without making some noise. So, crouched under the edge out of sight from above, he waited, cold, tired, and heavy of heart, through the night till the chill dawn. Then with infinite care he let himself down from tree to tree, passing the strap round a trunk and holding firmly to it until his feet were secure below. He reached the stream, waded through, and found his two companions waiting with oriental patience where he had left them.

"My say no can do not'ing," said Ah-Sam, glancing at his master's drawn, pale features.

Bob was too tired to reply. Under cover of the trees the three threaded their way back to the spot where they had left their provisions concealed, and there, making sure that no alarm had been raised in the fort, they sat down to their breakfast. Bob had no appetite. He forced himself to eat, for he knew not what further trial of endurance might be before him; then, feeling the need of sleep, he lay down behind a spreading bush, and bade the other two keep watch in turn.