“Look! They are menacing us! What shall we do?”

“There is but one thing to do,” declared Frank, grittily. “We must defend ourselves at all hazards!”

The five divers from the Aurelian were handicapped somewhat more than their rivals on account of the life lines.

But this did not deter them from making a threatening move just the same.

They advanced with excited gestures. The foremost, Frank fancied, was Parker himself.

The young inventor was not a little disturbed as to what the outcome of the affair would be.

If blows were resorted to, then there must be loss of life. This was something which Frank always deprecated.

He could not endure the thought of destroying these men, though they meant to destroy him.

It was an easy matter to cut their life lines and terminate their existence in a brief moment.

And yet the horror of the thing held him enthralled.