Ned took the paper and examined it by the light of an electric searchlight held conveniently close by Harry. A quick exclamation brought his chums crowding about to investigate the cause.
"Look at this!" Ned cried. "If that isn't cheek!"
"It is blank paper?" queried Jack. "Let me see it."
"Well, of all the nerve!" gasped Jimmie, taking the paper from Ned's hand and examining it closely. "What do you think of that?"
"May I see?" inquired Francois, interestedly crowding forward.
"Sure," replied Jimmie. "Here he has written a 'ha, ha' message, and given it to the guard, claiming it was his pass to search our machine! I'll bet the villain has wrecked the Grey Eagle from stem to stern!"
"Let's look it over and find out," suggested Harry at once.
Producing searchlights, in compliance with Harry's thought, the boys carefully examined the outer parts of the machine. Apparently not a thing had been disturbed. The instruments were all in place, the lockers intact, and all guy and brace wires were in place. The boys felt easier.
"Maybe he put some more dynamite in the engine!" urged Jimmie.