The bell cleared of water, father and son took off their diving suits.
"Thank Heaven we are out of that!" came in the sign language from Amos Fearless.
"We were lucky to escape," answered Dave, earnestly. "But, father, the treasure—how will we ever get at it, with those demons around?"
At this the old diver shook his head slowly.
It was a problem difficult, if not impossible, to solve.
"I wouldn't like to meet those fellows again for a million dollars," went on Dave.
And his father agreed with him.
It seemed a long while before they emerged from the ocean, at the side of the Swallow.
Those on the ship lost no time in bringing them on board and questioning them regarding what they had discovered.
The story about the demons was listened to with keen interest by Doctor Barrell.