Geoffrey followed still more cautiously. On and on they went, until at length they paused. Then the light from the lantern grew stronger. From behind a ledge of seaweed-clad granite Geoffrey watched them furtively. They were waiting for something—a signal, probably—before going farther.

The signal seemed to come at last, from where it was impossible for Geoffrey to judge, and then the advance was resumed. Presently they emerged into the deep below-tide level vault under the castle, where Geoffrey had seen Marion walking in her sleep.

Mrs. May turned to her companion and gave him some sharp command. She had lost all her levity and Geoffrey could see that her dark eyes were glowing. The native salaamed and laid his hand upon the lantern. The next instant the place was plunged into pitchy darkness. Five, ten minutes passed, and nothing was heard but the lap of the ebbing tide on the shore. Then a hand was gently laid on Geoffrey's arm.


CHAPTER XXII DEEPER STILL

So startled was Geoffrey that he felt the moisture spurt from every pore like a rash. But, fully conscious of his danger, he suppressed the cry that rose to his lips, nor did he move as he felt a thick cloak thrown over his head. He slipped his revolver into his hand and fumbled it against the cold cheek of his antagonist.

But the antagonist took it coolly. A pair of lips were close to Geoffrey's ear and the smallest, faintest voice spelt out the letters, T-c-h-i-g-o-r-s-k-y. Geoffrey put the weapon back in his pocket. At the same time he felt about till his fingers touched the hand of his companion. No doubt about it. The other was Tchigorsky beyond question. Perhaps he had been testing Geoffrey's courage and resolution; perhaps the danger had deepened unexpectedly.

Presently the light of the lantern popped up again, in response to some subtle signal, and once more the conspirators moved on to the vault above. Tchigorsky lifted his head.

"Where are they going?" Geoffrey asked.