“Describe the man,” begged Jack.

The senior machinist gave a description that instantly denoted Sam Truax as the man in question.

“Did you leave him alone in here, at any time?” demanded Hal.

“Let me see. Why, yes, sir. The man must have been alone in here some three-quarters of an hour.”

[pg 151] Jack and Hal exchanged swift glances.

There seemed, now, very little need of carrying the investigation further.

CHAPTER XV: ANOTHER TURN AT HARD LUCK

When he could trust himself to speak Hal Hastings addressed the naval officer.

“I think Mr. Benson and myself understand, sir, how it happened that this damage was done. There are extra parts in the repair kit. In twenty minutes, sir, I think we can have the engines running smoothly once more.”