All was the darkness of the ocean depths about. Nothing could be seen beyond the slight radius made by the light on their helmets.
The Dart had left them.
What did it mean?
For a moment the explorers were appalled with the most startling realization.
Left at the bottom of the ocean, upon a sunken wreck.
There was no possible way of ever reaching the surface.
That is unless the Dart should return from where it had gone, and why it should have left them in this manner was a mystery.
Frank knew that Barney and Pomp would not leave the vicinity for any light reason.
“Something has happened!” he exclaimed in dismay.
“The Dart has met with a mishap.”