Five minutes elapsed, ten, a quarter of an hour. Frank was becoming anxious. Perhaps the man never would sit down; perhaps he did not intend to relax his vigilance until another came to relieve him of his duties.

Even as the thought crossed the boy's mind, the man stopped, yawned loudly, and then, seating himself upon the ground with his back resting against the great central rock, produced an opium pipe and proceeded to roll a pill.

Frank's heart was in his mouth. He knew that the moment of his great ordeal had come. The man had played into his hands; for not only was the opium bound to make him drowsy, but he had planted himself in the very situation that gave the boy his best opportunity. Frank intended to climb over the central boulder, and had already satisfied himself that the ascent would be a matter of no difficulty at all.

What lay beyond was another question. He had never had any means of ascertaining whether or not he would be able to climb down the other side of the rock, much less make the descent of the slope. He who is over-cautious will, however, accomplish nothing. The traveller who considers the pitfalls in his way and the many dangers that lurk upon the highroad makes little or no progress, and as often as not fails to arrive at his destination. He who would gain all must risk all; he who will risk nothing gains nothing--or, at least, does not deserve to do so.

Frank glanced back into the cave. By the dim light of the fire he was able to see that both his uncle and Mr Waldron were stretched at full length upon their mattresses, looking up. No doubt each was unable to bear the continued suspense, the silence that had endured so long, but must take one last look at him who carried with him the fortunes of all three.

The boy glided into the shadow of the rock. There he paused a moment, waiting breathlessly to learn whether or not he had been observed whilst he was crossing the narrow strip of moonlight. A minute passed, and as nothing happened Frank knew that he was still safe.

Then, very slowly, he began to climb. He had taken off his boots, and these were suspended by means of the laces around his neck. He was careful not to make the slightest sound; he was fearful almost to breathe. He knew that the whole enterprise was in jeopardy, that at any moment a loose stone might fall from the rock, thus attracting the attention of the sentries.

He succeeded in gaining the top, and there lay flat upon his face. Knowing that the utmost caution was of far more importance than haste, he did not move for some time. Then, slowly lifting his head, he took in his surroundings.

The sentry on the right had not shifted his position. He still rocked his arms and sat staring straight at the moon. The man on the left was invisible to Frank, being immediately under the rock. He had probably smoked his pipe of opium, and was now in that semi-dazed, self-satisfied condition that invariably follows an administration of the drug. The boy wormed himself forward, until he had gained the furthermost edge of the rock, which was flat-topped, like a table. Thence he was able to see into the second cave, where Cheong-Chau and his men were fast asleep, lying close as dogs around the dying embers of a great charcoal fire.

When Frank peered over the edge of the rock, in order to decide upon the most suitable means of descent, his heart for a moment failed him. It was as if he was gazing down into one of the uttermost pits of Hades.