He turned and took a menacing step toward me.

"Hands up!"

It was a shrill, firm voice that rang out at the mouth of the cave as a figure cut off what little light there was.

. . . . . . .

Elaine passed along, hunting for the trail. Suddenly a shower of pebbles came falling down from a cliff above her. Some of them hit her and she looked up quickly.

There she could see me being led along by my captors. She hid in the brush and watched. During all the operations of the descent of the rock stairway and the resetting of the alarm, she continued to watch, straining her eyes to see what they were doing.

As we entered the cave, she stepped out from her concealment and looked sharply up at us, as we disappeared. Then she climbed the path up the cliff until she came to the flight of stone steps leading downward again.

Already she had seen the man behind me doing something with the stone that formed the top step. She stooped down and examined the stone. Carefully she raised it and looked underneath before stepping on it. There she could see the electric connection. She set the stone aside and looked again down the dangerous stairway.

It made her shudder. "I must get him," she murmured to herself. "Yes, I must. Even now it may be too late."

With a supreme effort of determination she got herself together, drew my gun which she had picked up, and started down the cliff, stepping noiselessly.