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At this moment they caught sight of him coming up a timbered

draw. He lowered them into the shaft, which was about six hundred

feet deep. From the foot of the shaft went a tunnel into the

heart of the mountain. Steve led the way, flashing an electric

searchlight as he went.

"We aren't working this part of the mine any more," he explained.

"It connects with the newer workings by a tunnel. We'll go back

that way to the shaft."

"You've got quite a safe prison," commented the other.