CHAPTER XXVII
A NEW MYSTERY
"Danger," shouted Ralph. "Quick, men. Do you see ahead there?"
Down the rails a red signal fuse was spluttering. It was quite a distance away, but they would reach it in less than sixty seconds if the present fearful speed of the train was kept up.
"Hear that?" roared the conductor in a hoarse, frightened tone.
Under the wheels there rang out a sharp crack, audible even above the roar of the rushing train—a track torpedo.
Ralph ran across the top of the forward car. As he reached its front end, Lyle turning discovered him.
He set up a wild yell, reached into the tender, seized a big sledgehammer lying there and braced back.
The young fireman was amazed and fairly terrified at his movements, for Lyle began raining
