"Now I see through it. Those obstructions were put on the rails to stop the train at this point so that the body could be removed from this car."
"By whom?" demanded the startled baggage master.
"Accessories of the villain who killed that man!" cried the boy. "They've carried the body off in the swamp to hide the evidence of their crime. Come, Old King Brady, alight here and see if we can trace it."
The detectives made a rush for the door and leaped from the train.
They landed beside the roadbed, and the cars went on without them.
CHAPTER III.
THE GREAT SWAMP MYSTERY.
Heavy banks of dark clouds were flying across the lowering sky. Occasionally the big silvery moon burst from the rifts and flooded the landscape with its mellow light.
During one of these intervals the two detectives gazed around.
The train had disappeared in the distance.