Also there were actually seen traces of roads and paths and many other things to prove that this had been a nation above the surface.
For many miles this sort of thing continued.
Then the Dart came once more to a wild and desolate expanse of sand.
It extended many miles.
Frank held the Dart down for a close run over this.
He hoped then to reach a point in the Atlantic Valley which was merely an island in the midst of the vast water.
On the chart the island was known under the name of Gull Island. Here Frank had thought of going to the surface for a brief time.
For hours the submarine boat ran on at full speed.
The bed of the sea here afforded no new features for study, and Von Bulow had no desire to stop.
So the Dart kept on until at length the end of the plain was reached.