Then the voyagers skipped into the cabin and Frank sent the Diver to the bottom.
Westward now over the sunken isthmus her prow was turned. For hours she kept on.
Toward night the place where they had first descended was reached. Here a stop was made.
Thus far the trip was a glowing success. No serious mishap had marred the project.
But could the submarine voyagers have read the future they would have experienced not a little of fear and dread apprehension.
Thrilling events were in store.
So far there had been discovered no indication or logical evidence of the possible existence of inhabitants on the isthmus in former days. Wade was not a little disappointed.
But when he remembered that there was yet a goodly distance between them and the Yucatan coast he did not altogether lose faith.
He hoped for the best.
All were somewhat exhausted with the incidents of the past forty-eight hours, so they were glad enough to turn in, Barney being left on guard, to be relieved by Pomp later in the night.