“How many tenders does the Government have in service?” queried Jack.

“I think there are about forty-six on both coasts. And you may be interested to know that they are all named after some kind of a flower, the same as battleships are named after States. There is plenty of work for them to do, too, for besides carrying the supplies, they take care of all the buoy planting. That’s tough work. In the Spring and Fall we have to gather up all the old buoys that have been in the water a long time and replace them with new ones that have been overhauled in the Portland yard. You see barnacles and other submarine growths make it necessary to take the buoys out every so often and scrape and paint them. Then of course they have to be returned to the water again. There are all kinds of buoys in the service and they all mark different types of danger points. There are whistling buoys, bell buoys, light buoys, unlighted buoys and spar buoys, and none of them is particularly easy to handle, I can assure you. Many a man has lost a leg or an arm while trying to put one of the blooming things over the side of a vessel.”

“I’d like to watch the operation some time,” said Jack.

“Well, perhaps you’ll have an opportunity to. But just now I’d forget about it and pay more attention to the cook’s bell. He’s been ding-a-linging all over the ship. Don’t you want something to eat?”

“Eat, why I’m starved,” said the lad. And together he and the captain went into the dining-room.

The marine engineer had finished his work on the plans during the few hours before dinner and was at liberty to spend the time on deck with Jack and the captain during the afternoon. The run to Hood Island took about eight hours in all, and the captain had estimated that they would not make their destination much before four o’clock.

The vessel was well out to sea and running due north when Jack came on deck and the boy thrilled with pleasure when he viewed the vast expanse of lonesome water. Astern was a long trail of black smoke across the sky left by a steamer that had disappeared below the horizon, while north and off the port bow was a distant sail almost directly in the path of the tender. Jack watched this sail curiously, for he was interested to know how soon the Blueflower would overtake it. Gradually they drew up on it until he could make out the rig without difficulty. She appeared to be a very swift sailing yawl and Mr. Warner confirmed this when a few minutes later he brought his binoculars from the cabin and had a good look at her.

“She’s a trim little yawl and from the pulpit-like affair on her bowsprit I take it she’s a swordfisherman. These waters are full of ’em. I wish that they would locate a big fish, then you’d see some fun.”

“From her lines,” he said after another inspection, “I should say she was a mighty speedy craft. She has a big patch in her main sail. And her name is—F-i-s-h—H—it looks like Fish Hawk, but I can’t be positive. Hang it, I would like to— Say, fellows, get your glasses. They are after a swordfish! There’s a man with a harpoon climbing out onto her bowsprit now! Hurry!”

Jack and the captain hustled into the cabin and a moment later returned armed with binoculars. Through his, Jack got an excellent view of the little vessel. She had altered her course so that she was running at a right angle to the direction taken by the tender and the huge patch in the mainsail was quite visible. He could see the harpoon wielder climbing out on her bowsprit, too, and he watched intently as he saw him poise, spear aloft, ready to strike.