The Dolphin proved wonderfully stanch and seaworthy. But at times her sides would creak and groan, which was an indication that she was at too great a depth. Then it would become necessary to raise her to a point where the pressure would not be so tremendous.

To attempt to describe in detail the wonders witnessed by the crew of the Dolphin each day would require many volumes.

Northward she kept for weeks, and then all became conscious of the fact that they were getting into Arctic waters.

Frank repeatedly studied his chart, and took note of the formation of the ocean’s bed.

One day he declared:

“We are in the upper waters of Baffins Bay and under the ice. Above us it must be twenty feet in thickness. If any accident should happen to the Dolphin now we could never hope to reach the surface. We should be buried forever in these lonely depths.”

It was an appalling thought, and the voyagers exchanged glances.

The words had barely left Frank’s lips when, as if to emphasize his declaration, there came a stunning crash and the Dolphin seemed likely to turn completely over.

CHAPTER V.
BATTLE WITH A WHALE.

Not one in the party but was hurled to the deck. But each gained his feet quickly.