"That riot back in camp," shivered Mr. Bas...o...b.. "I simply abhor all fighting."

"So I noticed," commented Mr. Prenter, dryly. "Yes; I believe the trouble is over, unless our young chief engineer intends to stir up something new before bedtime. Do you, Reade?"

"I haven't anything in mind," Tom answered with a smile. "Gentlemen, I am afraid you may think I do things with a high hand. But I have been at this engineering business just long enough to know that I must banish all serious vices from a camp of laborers if I hope to get the best results in work out of the men. So I must tackle some problems rather stiffly, and use my fists when I'm driven to a corner."

"I am not thoroughly satisfied of the wisdom of your course," said Mr.

Bas...o...b..slowly.

"Sorry to disagree with you, Bas...o...b.." broke in the treasurer, "but I've had some experience in handling what is called wild labor, and I believe that Reade goes at it in just the right way. I don't believe there are really fifty really wild or troublesome men in that camp. The few bad ones usually start trouble going, and then the good ones are driven into it.

Let Reade stop the vices over yonder, in the way that he wants to, and the worst of the crowd will call for their time and leave camp. We shall then have a thoroughly good lot of men left, who'll do more and better work."

"That is," almost whined President Bas...o...b.. "if Reade, in doing what he wants, doesn't stir up so much enmity that we have the rest of our wall blown out into the gulf."

"Mr. Bas...o...b.." put in Tom, "while I must have control of the men and their camp I don't wish to do anything to cast reflection on yourself as the head of the company. May I therefore ask, sir, if there is any especial reason why Evarts should be allowed in this camp?"

President Bas...o...b..fidgeted in the porch chair on which he was sitting.

"I---I don't know of any reason, Mr. Reade, why Evarts should be allowed in camp if his presence prevents you from keeping order as you wish."

"Then you approve, sir, of my intention to keep him out?"

"I---I won't question your right to handle the matter as you wish, Mr.

Reade," was the president's evasive reply.

"Thank you, sir."

Peters was soon back with the six men---two each of the negroes, Italians and Portuguese. All of them understood English.

Harry described the negro who had attacked him on the retaining wall, after which Tom asked:

"Have any of you men ever seen that negro? Have you any idea who he is, and where he can be found?"

None of the six admitted any knowledge of the mysterious black man.

"Then I want you to keep his description in mind," continued Tom. "Keep your eyes open, at all times, for any chance glimpse of him. The man who brings me information leading to the capture of that big negro will receive a reward of one hundred dollars in gold." "Keep your eyes open, won't you? You may find him prowling around the wall at any time. He may walk out on the wall, or he may be found hiding near in a boat. Watch for him."

All promised eagerly that they would do all in their power to earn the hundred dollars.

"That's what I call good business!" cried Mr. Prenter approvingly, as soon as the foreman and the men had gone.

"Does the hundred dollars come out of the company treasury, Reade, or from your own pocket?" inquired President Bas...o...b..

"Really I hadn't thought of the matter," answered Tom.

"The company can afford to pay its own bills," broke in Mr. Prenter, rather gruffly.

"It's about time to turn in, isn't it?" asked Mr. Bas...o...b.. striking a match and glancing at his watch.

"I'm going to stay up a little longer, and talk with Reade about the dread mystery of our million dollar breakwater, if he'll let me," hinted Mr.

Prenter.

Mr. Bas...o...b..rose as though to go into the house.

"While we're talking about the matter, sir," suggested Tom, "wouldn't it be a good idea for us to stroll down to the beach and look out along the wall to see how Foreman Corbett and his gang are guarding the breakwater to-night?"

"Fine idea," nodded the treasurer of the company.

"Then, if you're all going away, and intend to leave the house alone, I think I may as well go with you," grunted Mr. Bas...o...b.. "I don't exactly like the idea of staying here alone in such troublesome times."

Harry walked beside Mr. Bas...o...b.. while Tom led the way with the treasurer.

Mr. Renshaw brought up the rear.

As the party came in sight of the beach and glanced out seaward, they saw many a little, dancing light out on the retaining wall. Each light showed where a workman patrolled under the orders of Foreman Corbett. The latter was aboard the motor boat, "Morton," which ran up and down near the wall, throwing the searchlight over the scene.

"Reade," remarked Mr. Prenter, "I don't see that the enemy have any chance to-night to run in and work harm to our property."

Hardly had the treasurer spoken when Tom, looking out seaward, saw a sudden, bright flash of light upward. There was a brief pause---then the sullen boom of an explosion reached their ears.

"Mystery of all mysteries!" choked Tom Reade. "There goes another section of the wall---blown up under our very eyes!"

CHAPTER XI

A MESSAGE FROM A COWARD

"Now Reade," began President Bas...o...b.. in a shaking voice, "what can you say---"

Tom didn't wait to inform him. The young chief engineer was darting out on the wall as fast as he could go.

Already the "Morton" had turned, and was chugging back to the scene of this latest outrage, the searchlight flashing back and forth, in the vain effort to detect any small craft stealing away from the vicinity.

"I---I can't race on a narrow runway like that," faltered Mr. Bas...o...b.. halting at the beginning of the narrow wall. "I---I'll wait here, Mr.

Renshaw, will you keep me company?"

"If you so direct, sir," replied the superintendent. "For that matter, what Reade and Hazelton can't find out, out yonder, will probably never be discovered."

"Do you share Mr. Prenter's infatuation for those two young men?" asked the president of the Melliston Company.

"I can't say about that, sir," Renshaw replied, with a puzzled air. "But this much I know---I never worked with two more capable men of any age.

They always know what to do, and they never lose their heads."

Mr. Bas...o...b..compressed his lips tightly.

In the meantime Tom, Harry and Treasurer Prenter covered nearly a quarter of a mile along the retaining wall when the motor boat, putting about, picked them up with the searchlight.