Jack and the boy made themselves as comfortable as possible in the shelter of an overhanging cliff; but the hours till dawn seemed to creep along. Jack's thoughts dwelt in turn on the prisoners and their fate, and on Gabriele waiting in the junk. She was dressed in Chinese clothes, but would she escape undetected when the vessels in the bay were searched in the morning? Jack was tempted to send Hi Lo back, so that she might be warned; but second thoughts counselled him to wait until daylight. He might then at least let her know whether the count was alive or dead.

There was no sleep that night for either Jack or Hi Lo. As soon as it was light enough to see the ground they resumed their search. Almost immediately Jack understood why they had failed to pick up the trail the night before. The party had climbed on to a ledge of bare rock a few feet above the ground, and on this their boots had left no mark. But a little farther up the hill the track could be distinguished. It led directly towards a dark opening in the cliff—one of the galleries of the deserted mine.

As they approached the opening, Hi Lo began to shake with fear. A mine to an unsophisticated Chinaman is a terrible thing. He believes that the delving of the earth lets loose innumerable demons, enraged at the disturbance of their homes. So strong is this belief that mining is actually forbidden by law, though the law is now fast becoming a dead letter. Hi Lo knew nothing of western progress, and he implored Jack to turn aside from this black tunnel into the earth. Jack did not laugh at the boy's fears; he told him to remain at the entrance and give warning if anyone approached. Then he stepped into the mouth of the gallery.

He had already concluded that the mine consisted of galleries, not of shafts. The outcrop of coal was visible in the side of the hill. He therefore had no fear of coming unexpectedly upon a pit. But he groped his way along with great caution; the truck rails had not been removed from the floor of the gallery. The air was pure; he felt indeed a slight draught, which pointed to the existence of an outlet of some kind in the direction in which he was going. After proceeding for a few minutes he was brought to an abrupt halt by a solid wall of rock in front. Feeling each side of the gallery, he found that the passage branched off to right and left. Which turning should he take? He stood in indecision; in the darkness there was nothing to guide his choice. Then it occurred to him to shout. If his father and the count were in the mine, they were doubtless alone: they would hear his call, though it were inaudible outside. He gave a halloo, and listened; he heard nothing but the sound rumbling along the passages. He shouted again; there was an answering cry behind him; then the patter of footsteps hurrying, stumbling along towards him. Facing round, he raised his fist to fell an enemy; but a small form cannoned against him, and a boy's voice uttered a gasping yell. It was Hi Lo. Hearing the shout, he had unhesitatingly plunged into the blackness. Anxious as the moment was, Jack admired the spirit of the little fellow, who, to come to his assistance, had braved dangers none the less terrifying because so purely imaginary.

"Well done!" said Jack, patting his arm. "Now run back and wait for me. I'm all right here."

"My no can do," said Hi Lo decisively. "My stay-lo long-side masta. Big piecee debbils this-side; my helpum masta fightey; my no can lun wailo."

"Very well. Keep close."

Again and again he shouted, always without response. Then at a venture he turned into the right-hand passage. After a few yards he felt Hi Lo's hold on his tunic relax. The boy had fallen to the ground. Hastily stooping he picked him up, almost falling as he breathed the lower stratum of air, and staggered with his burden to the main gallery. He had but just reached it when he himself was overcome and sank to the floor. He did not lose consciousness, but his head buzzed and swam, and he felt a horrid nausea. When he was somewhat recovered, he carried Hi Lo back to the entrance, and was relieved to find that in the open air the boy quickly regained consciousness. But he could not expose the little fellow again to such peril; bidding him remain at the spot, and on no account to follow, he plunged once more into the darkness.

This time he turned into the left-hand passage, and found that it sloped rapidly upward. Before long he was brought up by a similar obstacle; the gallery again divided. He felt a slight current of air strike against him from the left-hand side; in that direction he continued to grope along. If the words he had overheard meant anything, they meant that the prisoners might be expected to survive for a few days. As that would be impossible in the foul air of the unventilated passages, he could not be wrong in pressing forward wherever he could breathe. Again he shouted; again there was no reply but a series of echoes. But moving on again, and listening intently, he fancied he heard a low continuous rumbling ahead; this could not be an echo. The sound grew stronger as he advanced; in a few moments he understood its cause; it was unmistakably the sound of falling water. Stepping now with still greater caution, he soon became aware that he was within a few yards of the waterfall; the sound seemed to rise from beneath his feet. He threw himself on his face and crawled forward—and the floor ended; he was on the verge of a precipice.

With a shudder and a long breath he drew back. For some distance he had noticed that the walls of the passage suggested to the touch stone rather than coal. They were hard as flint, and the roof was so low that he had to bend almost double. Apparently it was a prospector's gallery, not a real working. He wished he had a match; in the current of air that he now clearly felt, there was little risk of explosion from fire-damp. But his box was empty. He understood that the sound of the waterfall must hitherto have smothered his shouts; but if he hallooed now he might be heard, if there was anyone within hearing. Making a bell of his hands he uttered a shrill coo-ee. It gave him a kind of shock when, apparently from only a few feet below him, there came an answering call.