"That would be foolish. All I want to do is to watch and see that those two horsemen don't come back."

"Two to watch is pedder as vone, Matt," answered Carl firmly. "Is der Red Flier hurt anyvere?"

"I can't see that the machine has been tampered with at all." He stepped around in front and "turned over" the engine. "Everything appears to be just as we left it," he added, "so I am compelled to think that those two horsemen rode into town after that letter."

"Und Domlinson didn'd know a ting aboudt it, hey?"

"That's the way it looks. Of course, it's hard to under——"

Matt bit off his words abruptly and whirled around from the front of the machine. A crunch of footsteps could be heard outside, cautiously approaching the barn door.

Swiftly Matt extinguished the light, caught Carl by the arm and pulled him across the barn and into a box-stall. There they crouched down and peered out.

"By shinks!" whispered Carl. "A lod oof t'ings vas habbenin' to-nighdt. Dose two fellers vas comin' pack! How ve ketch dem, hey?"

"Hist!" warned Matt.

Just then the barn door opened, and a dark form could be seen against the lighter background of the doorway.