Once, in the long ago, the brig Industry had sailed away from the wharf and out into the great ocean on a voyage to India. And she had been gone from the wide river three or four days, and she was well out into the ocean and no land was in sight, but only water and once in a while another ship. But they didn't see ships as often as they had at first, and it was good weather and the wind was fair, so that there wasn't anything much for the sailors to do. The mates kept them as busy as they could, washing down the deck and coiling ropes, and doing a lot of other things that didn't need to be done, for the Industry had just been fixed up and painted and made as clean as she could be made. And that was pretty clean. So the sailors didn't care very much about doing a lot of things that didn't need to be done, but they did them, as slowly as they could, because, if they said that they wouldn't do things that the mates or the captain told them to do, that would be mutiny. And mutiny, at sea, is a very serious thing for everybody. It satisfied Captain Solomon and the mate well enough to have the men do things slowly, so long as they did them. For they knew that the men would do things quickly if there was any need for quickness.
Then, one morning, just as it began to be light, the man who was the lookout thought that he saw something in the water about the ship that didn't look quite like waves. And it got a little lighter so that he could make sure, and he called some others of his watch and told them to look and see the school of porpoises. And they all looked, and those men told others who looked over the side, too, and pretty soon all the men of that watch were leaning on the rail and looking at the porpoises. That made the mate who was on watch look over, too, so that every man on deck was looking over the side into the water. Then the sun came up out of the water.
What they saw was a great many big fishes, all black and shining, and each one had spots of white on its side and a funny-shaped head. Most of them seemed to be about the size of a man, and they swam in a funny sort of way, in and out of the water, so that their backs showed most of the time, and they glistened and shone and their spots of white made them rather a pretty sight. And now and then they spouted little jets of water and spray out of their heads into the air, just as if they were little whales. Porpoises are more like little whales than they are like fishes, for they have to breathe air, just as whales do, and they spout just as whales do, and they are like whales in other ways. They aren't really fishes, at all.
The Industry was sailing very fast, for the wind was fair and strong, and she had all the sails set that she could set; but the porpoises didn't seem to think she was going very fast, for they had no trouble at all to keep up with her and they could play by the way, too. And so they did, hundreds of them. Some of them kept just ahead of her stem, where it cut through the water, and they leaped and gambolled, but the ship never caught up with them. And they were doing the same thing all about.
Seeing the porpoises that kept just ahead of the Industry made the sailors think of something and they all thought of the same thing at once. Perhaps it was because it was about breakfast time. Four of the men went aft to speak to the mate, who was standing where the deck is higher. And the mate didn't wait for them to speak, for he knew just what they were going to ask him. The men had their hats in their hands by the time they got near.
The mate smiled. "Yes, you may," he said. "I'll get 'em." And he went into the cabin.
When he had gone the men grinned at each other and looked pleased and each man was thinking that the mate was not so bad, after all, even if he did make them do work that didn't need to be done, just to kept them busy. But they didn't say anything.
Then the mate came out, and he had two harpoons in his hand.
"There!" he said. "Two's enough. You'd only get in each other's way if there were more. Bend a line on to each, and make it fast, somewhere."