"I guess it was only a tramp," said Mr. Henderson.
"I hope he doesn't go near the machine shop," added Mr. Roumann. "Still, if he did, the two machinists sleeping there would hear him."
They returned to the room, and Andy stood his gun in a corner. The weapon was seldom far from him.
"What was he doing when you saw him?" asked Mr. Henderson.
"Just sneaking along the window here as if listening."
"Maybe he was trying to hear what we were talking about," suggested Jack.
"Or trying to discover my secret," added Mr. Roumann quickly. "Fortunately I never talk about the secret of the power. But I shall be anxious about the machine shop."
"Suppose we go out and take a look around it," proposed Mark. "Ned and Sam will know if any intruder has been sneaking around there."
They all went out where the Annihilator was in process of building, but the machinists said they had not been disturbed, and they were sure no one had stolen anything.
There was no further disturbance that night, but when Mr. Roumann paid an early visit to the machine shop the next morning, he uttered a cry of surprise.