Gradually, the faint light that had filtered through the brush and débris before the tunnel faded quite away, and a damp charnel-house chill struck through the limbs of the two refugees, and made them shiver; the flow of water from the dripping walls seemed to have increased; Gabriel's experienced eye had already noted that the earthquake had apparently opened seams in the gully and closed up one of the leads. He carefully laid his burden down again, and crept to the opening. The distant hum of voices and occupation had ceased, the sun was setting; in a few moments, calculating on the brief twilight of the Mountain region, it would be dark, and they might with safety leave their hiding-place. As he was returning, he noticed a slant beam of light, hitherto unobserved, crossing the tunnel from an old drift. Examining it more closely, Gabriel was amazed to find that during the earthquake a "cave" had taken place in the drift, possibly precipitated by the shock, disclosing the more surprising fact that there had been a previous slight but positive excavation on the hill side, above the tunnel, that antedated any record of One Horse Gulch known to Gabriel. He was perfectly familiar with every foot of the hill side, and the existence of this ancient prospecting "hole" had never been even suspected by him. While he was still gazing at the opening, his foot struck against some glittering metallic substance. He stooped and picked up a small tin can, not larger than a sardine box, hermetically sealed and soldered, in which some inscription had been traced, but which the darkness of the tunnel prevented his deciphering. In the faint hope that it might contain something of benefit to his companion, Gabriel returned to the opening, and even ventured to step beyond its shadow. But all attempts to read the inscription were in vain. He opened the box with a sharp stone; it contained, to his great disappointment, only a memorandum book and some papers. He swept them into the pocket of his blouse, and re-entered the tunnel. He had not been absent altogether more than five minutes, but when he reached the place where he had left Jack, he was gone! CHAPTER IX. IN WHICH HECTOR ARISES FROM THE DITCH.