It developed that Tom had done so, a fact which Ned learned on the morning of the day set for the test.
"Come over about nine o'clock," Tom said to his chum. "I guess it will be dark enough then."
Meanwhile Schwen and Otto Kuhn, the other man involved, had been locked up, and all their papers given into the charge of the United States authorities. A closer guard than ever was kept over No. 13 shop, and some of the workmen, against whom there was a slight suspicion, were transferred.
"Well, we'll see what we shall see," mused Ned on the appointed evening, when a telephone message from Mr. Damon informed the young bank clerk that the eccentric man was coming to call for him before going on to the Swift place.
Chapter X
A Runaway Giant
"What do you think it's all about, Mr. Damon?"
"I'm sure I don't know, Ned."
The two were at the home of the young bank clerk, preparing to start for the Swift place, it being nearly nine o'clock on the evening named by the youthful inventor.