The cutter sped around the next turn of the tunnel and emerged into a huge, softly lit cavern. Sturt's eyes bulged and Campbell uttered an exclamation of amazement. For in this mighty water-cavern there floated in a great mass, scores of sea-going craft, large and small.
All of them were capable of breasting storm and wind, and some were so large they could barely have entered. There were small yachts, big motor-cruisers, sea-going launches, cutters larger than their own, and among them the gray motor-launch of Chandra Dass.
They were massed together here, those with masts having lowered them to enter, floating and rubbing sides, quite unoccupied. Around the edges of the water-cavern ran a wide rock ledge. But no living person was visible and there was no visible source for the soft, strange white light that filled the astounding place.
"These craft must have come here from all over earth!" Campbell muttered. "The Brotherhood of the Door has assembled here—we've found their gathering-place all right."
"But where are they?" exclaimed Ennis. "I don't see anyone."
"We'll soon find out," the inspector said. "Sturt, run close to the ledge there and we'll get out on it."
Sturt obeyed, and as the cutter bumped the ledge, Campbell and Ennis leaped out onto it. They looked this way and that along it, but no one was in sight. The weirdness of it was unnerving, the strangely lit, mighty cavern, the assembled boats, the utter silence.
"Follow me," Campbell said in a low voice. "They must all be somewhere near."
He and Ennis walked a few steps along the ledge, when the American stopped. "Campbell, listen!" he whispered.