Jack’s curiosity was aroused. When Rhodes took the trail leading away from the mining camp, he followed at a safe distance.

The engineer did not go far. Leaving the well-defined path, he made his way to a projecting, flat rock which gave a clear view of the valley below.

Jack guessed that the man intended to signal, and he was right.

Rhodes lighted the lantern. Uneasily, the engineer glanced about. No sound had given warning that Jack crouched behind the bushes, yet the man seemed to sense that he was not alone. However, after carefully surveying the area close by, he slowly began to move the lighted lantern back and forth.

After awhile, he set it down on a rock and waited. From his hiding place, Jack could not see below the ridge. He knew, however, from Rhodes’ reaction, that no answering signal had been received.

After perhaps ten minutes, the engineer repeated the lantern signals. Again he failed to obtain answering flashes.

After another long wait, the man tried a third time. The valley below remained dark.

“Stupid fool!” Rhodes muttered, losing patience. “Doesn’t he see my signal? Or has something gone wrong?”

Angrily, the engineer extinguished the lantern and left the high rock. Jack saw him retrace his way to the cottage. A moment later, the light went out, telling him that Rhodes had gone to bed.

Satisfied that he could learn no more by remaining abroad, Jack ambled back to camp. To his surprise, he found Mr. Livingston up and dressed.