“Oh, I fancy he has, by this time, been picked up and towed to port,” put in Jerry. “Well, shall we go down?”

“First go up, and renew our air supply,” suggested Ted. “We can’t have too much of that. Then we’ll work out our observations, and decide where we are.”

This was voted a good plan, and in a short time, under the manipulation of the boys and the members of the crew, the Sonderbaar was tossing about on the sun-lit waves. She was in the midst of a watery waste, no other craft being in sight.

While the air tanks were being filled, Ted Rowland worked out their position. They were about a thousand miles from the coast of America, and not far from the Bermuda Islands.

“Not so bad,” announced Ted. “We will soon be home now.”

“But not before I get my crabs,” stipulated the professor. “Can we go down here?”

“It is too deep just at this point,” said Ted, as he consulted a chart obtained from the pilot house. “But about fifty miles from here there is a bank that is only about four hundred feet down. We can safely make that, I think.”

Meanwhile Dr. Klauss had seemed to accept his fate with resignation. He remained quietly in his cabin, and his two foreign friends were in theirs.

The deck hatch of the Sonderbaar was closed, and she sank below the surface. She was then headed for the comparatively shallow part of the ocean, and speeded up.

“We can run as well as if Dr. Klauss were here,” said Ned, who was allowed to attend to one of the motors.