The young inventor instantly set the pace.

On through the water went the mad flight of pursuer and pursued.

It was indeed hard to say which held the advantage.

The whale seemed to hold its own by gyratory motions which it was difficult for the Dolphin to follow with accuracy.

CHAPTER VII.
CHASING THE SILVER WHALE.

But still Frank believed that the Dolphin was gaining.

He entertained one fond hope.

This was that the whale would turn and show fight. He knew the inherent pugnacity of the species.

But it did not.

For some reason or other it chose to hold its erratic course. To attempt to overtake it was impossible.