"He's trying to find out whom he can bribe into saying we set fire to the yard," said Hal bitterly.

"Oh, on second thought Melville would conclude that would be too risky to do," observed Jack.

"Maybe--maybe not. I'm going over to look about and listen."

In less than an hour Eph Somers, agog with excitement, was back on the "Pollard."

"Say, fellows, that Potter fellow that got into Mr. Pollard's room and stole the papers broke jail last night. Now we know what Don Melville was here for! He had a hand in that!"

So far, the young fellow had refused to talk.

"Bribed by the Melvilles," Hal had declared. "But they'll find that expensive, for he'll continue to bleed them, now he knows how."

Jack, who usually reserved judgment until he knew some facts on which to build, was inclined this time to agree with Eph, and Hal was certain that Somers was right.

"It would be to their advantage to have Potter disappear before they begin their dirty work against Mr. Farnum," Hal insisted.

"I telephoned to Mrs. Farnum and she reports 'nothing new,'" continued Eph. "It's queer."

Just then the boys heard a hail and saw David Pollard, bag and brief case in hand, on the sh.o.r.e signaling to them.

"Where's Farnum?" he asked as soon as he was on the submarine.

"We'd, any of us, give six months' salary to know that, Mr. Pollard,"

said Jack, and went on to tell what had been taking place.

"That spells ruin for us," groaned the inventor, who knew how things stood financially.

"Do you think, Mr. Pollard, that we'd better suggest to Mrs. Farnum to put a detective on her husband's trail?" asked Eph.

"That trail would probably lead straight through the Melvilles," said Hal bitterly.

"No, don't do that--yet," replied Pollard.

"Mr. Farnum may be away on legitimate business," added Jack slowly.

Hal and Jack rowed Mr. Pollard ash.o.r.e. After bidding the inventor good-bye, the two youths decided to go to the shipyard. As they were about to enter the office they were accosted by a man who was coming out. He asked them if they were in Mr. Farnum's employ.

"Yes, sir," Jack answered.

"Can you tell me where he is? The office force could give me no information."

"Mr. Farnum is away at present," said Jack.

"I know that! Where is he?"

"Why should I tell a stranger about my employer's business?" asked Jack sharply.

"Here's my card." The man was a Mr. Stevenson, the head of a firm of ship's steel jobbers. "Here's a bill for twenty-five thousand dollars, and Farnum seems to have disappeared. I can sell this at face value, but I don't want to."

"Give Mr. Farnum a chance, Mr. Stevenson," pleaded Jack. "We can guess who is willing to buy that bill from you--for a bonus. The man will be as eager to buy next week as this."

The man looked shrewdly into the eyes of the two boys for a moment, then, with a shrug of his shoulders, turned away, saying:

"I guess this can wait awhile."

The boys, after a brief call in the office, went on to town. Mr.

Melville was fond of horses, and still drove a handsome pair.

"There comes Don Melville in his father's carriage. I don't wonder they hang on to it. Those horses are beauties," remarked Hal.

The carriage stopped and Don jumped out.

"Say, you muckers, things are happening and you won't be needed now on the 'Pollard.'"

"Really?" drawled Jack indifferently.

Hal could not summon indifference, or the appearance of it. He said contemptuously:

"Having helped a deserving young man to escape from jail, you'll probably put him on the 'Pollard.'"

Don flushed angrily and turned to the coachman, a brutal looking fellow.

"Johnson, chastise the young puppy!"

Johnson jumped down and raised his whip.

"Give it to them both!" yelled Don.

Just then Grant Andrews, the foreman in the submarine shed, having come up in time to hear and see what was taking place, sprang between the boys and the coachman. He crashed his fist into the man's face, and thus disposed of him, then grabbed the whip and brought it down on Don Melville's shoulders.

"Oh, you'll pay for this!" yelled Don.

"Then I may as well get the most out of it," retorted Andrews, and again brought down the whip, this time coiling it around Don's legs.

Don, seeing a grinning crowd about them and stinging with physical pain and humiliation, turned and sprang into the carriage. Johnson was already there, and they hurried away.

"Grant Andrews! Who would have thought it of you!" exclaimed Hal.

"Sorry I did it, boys?" and the flush on Andrews' face subsided and a grin came to his lips. He was usually an easy-going man, but when aroused he could act.

"We-ll, no," admitted Jack, while Hal laughed. "But come on; let's get out of this crowd."

It was several days after this affair that Mr. Pollard, who was on the submarine, got a message from Mr. Partridge, the superintendent of the yard. The message read:

"Mr. Partridge begs Mr Pollard to come to the office at once."

"I'll go, Jack. But I'm weary and may need support. Come with me, will you?"