As the submarine boat came rushing down they seemed alarmed, but Frank showed himself at the pilot-house windows, and made conciliatory gestures.
The submarine boat came to a halt not ten yards from the divers. No sign of the Donna Veneta’s wreck was visible anywhere.
“Get on a diving suit, Barney!” cried Frank. “Go out and ask them what they are doing here.”
“All roight, sor!”
Barney hastened to obey orders. But before he could leave the boat, the divers gave the signal and were pulled up rapidly to the surface.
Frank instantly reversed the tank lever. The Dolphin began to rise.
“Where are you going, Frank?” asked Clifford in surprise.
“To the surface!”
“What for?”
“I want to see whether these men are from the Aurelian or not.”