“Is the train safe?” he asked feebly.

“So far, yes; but what’s the trouble?”

Bob was silent for a moment, as if trying to pull himself together. Then he sat up.

“Where is the conductor?”

“I am the conductor.”

“You have an express car attached to the train?”

“Yes; but what——”

“Arrest the express agent.”

“Arrest him!” called three of the hearers.

“Yes.”