That is why, sir, I must be on my guard." The crew were on their feet all night.

No one thought of sleep.

The Abraham Lincoln, not being able to struggle with such velocity, had moderated its pace, and sailed at half speed.

For its part, the narwhal, imitating the frigate, let the waves rock it at will, and seemed decided not to leave the scene of the struggle.

Towards midnight, however, it disappeared, or, to use a more appropriate term, it "died out" like a large glow-worm.