It was next necessary to settle who should go. The judge himself was too old to attempt to cross the mountains alone upon so long and hazardous a journey. The choice, therefore, lay between Frank Armitage and Mr Waldron.

The American--who had already proved himself a man of the greatest courage, both physical and moral--was naturally anxious to take the risk himself. However, he could not be blind to the fact that he laboured under several very serious disadvantages.

In the first place, he was entirely ignorant of both the language and the country. He knew neither the habits and customs of the people nor the topography of Southern China. Frank, on the other hand, had been born and had lived all his life in China; on many a former occasion he had proved himself quite capable of conversing even with the most untutored and obstinate peasants. Moreover, the boy was the most active member of the party: he was a good runner; he could climb, if necessary, to the top of mountain peaks, and he was an adept at swimming--an important item, since he might have to cross the West River, as well as several tributaries, in order to reach Canton or the coast.

It was this consideration that settled the question in the mind of Mr Waldron. The American was obliged to confess that he could not swim except for a short distance in salt water. If he endeavoured to cross the strong current of a great river without even taking his clothes off, he would most assuredly drown.

"And in that case," he observed, "I might as well have stayed here to have my throat cut in my sleep, or sample the death by a thousand cuts."

He spoke of such atrocities as if they were nothing. He was so calm about it all that the judge looked at him, wondering whether he was one of the few really brave men in the world, or whether he was entirely devoid of imagination. In any case, Mr Waldron withdrew his claim to be allowed to undertake the adventure; and the choice fell upon Frank.

Once this all-important question was settled, it was obvious that there was nothing to be gained--indeed, there was much to lose--by putting off Frank's departure. The sooner he was away the better, though they did not then realise the supreme importance of time, the alarming fact that the lives both of Sir Thomas and Mr Waldron were to hang upon the thin thread of a few seconds.

It was decided that Frank should endeavour to make his escape from the cave that night. It was in the act of passing the sentries, posted at the entrance, that the bulk of his danger would lie. Once the boy succeeded in getting away from the cave, his absence would probably not be discovered until the following morning. He would, in that case, have several hours' start of any pursuers whom Cheong-Chau might think fit to send after him.

Frank had already considered the contingency of making a dash for liberty. He had, so far as he had been able to do so from the interior of the cave, studied the lie of the land. He had noticed that the sentries were not particularly vigilant and that they were armed with old-fashioned, out-of-date fire-arms which they possibly knew not how to use. One of these was a Martini-Henry carbine, and Frank had on one occasion seen a Chinese trying in vain to lower the lever, which was so rusted on to the lock that it was quite certain that the breech could never be opened.

Immediately before the entrance to the cave was the huge boulder, or rock, which has already been described. On either side of this rock a sentry was always posted. But these men did not necessarily face the cave. Indeed, as often as not, they looked the other way, interesting themselves in the wide panorama extended before them. None the less, since the two passages on either side of the boulder were very narrow, one could never hope to pass without being seen. Escape that way, therefore, was impossible without a struggle, which meant that the alarm would be given and a party would immediately start in pursuit of the fugitive.