“Kind o’ shark,” replied Cap’n Pem. “Biggest nuisance ever was. Jes rush in an’ thresh about and kill a lot o’ fish, and then gobbles of ’em up. That there consarn rascal was after them blackfish, though.”

“Whew, do they kill—Oh, look, Mr. Kemp’s boat’s fast!”

Sure enough, the second mate’s boat was rushing through the sea evidently towed by some creature, and a few moments later the boys saw the officer stand erect in the bow, poise his lance and lunge forward with it.

“Reckon we might jes as well pull over thataway an’ mebbe get a chanct to strike,” remarked Cap’n Pem, swinging the boat’s head as he spoke.

In a few minutes they were within hailing distance of the second mate’s boat.

“Did you get one?” yelled Tom.

“I’ll say so,” shouted back Mr. Kemp. “Come over here and bear a hand to tow this critter to the schooner.”

“Waall I’ll be sunk!” cried Cap’n Pem. “What’s the matter with thet there crew o’ yourn? Ain’t they got beef ’nough for to tow in a consarned leedle blackfish?”

The boats were now close together and the boys saw a huge black body rolling in the swell beyond the second mate’s boat.