“Why here’s a powerful drill, some lead hammers, another of copper, and a drill, to be attached to an electric light circuit. And here’s some sort of a fusing torch, to melt or fuse a hole through steel. What in the world can they want with these tools in an aeroplane?”
“Maybe they’re afraid of a break-down,” suggested Ned.
“What good would an electric drill or a fusing torch do even if they did get a break-down?” demanded Jerry. “No, there’s something queer here, and——”
“Hi there! Get away from that machine!”
“Clear out, you fellows! What are you doing there?” interrupted two angry voices, and our heroes looked up to see the two men—Brown and Black—running towards them across the enclosed field.
[CHAPTER III]
A SUDDEN DISAPPEARANCE
Startled, the boys moved back somewhat from the aeroplane, and waited, not without a little apprehension, the arrival of the two strange men. The strangers increased their speed, and came up on the run, their faces showing the evident anger they felt.
“What—what are you doing at our machine?” panted Black, the taller of the twain.