"This train," answered Mark demurely.
Solon Talbot frowned.
"You know what I mean. Why are you going to Buffalo?"
"A little matter of business."
"What business can a boy like you possibly have, I'd like to know?"
"It isn't my own business, Uncle Solon, and so I don't feel at liberty to tell."
"It is very strange. Have you a sleeping berth?"
"Yes."
"What number?"
"No. 7."