“Sold! To whom?”

“To this gentleman,” said Vorenglade, pointing to his travelling-companion, “to this gentleman, who thought that the business was worth going out of his way for and who came to Amiens to meet me.”

The old gentleman, a very old man wrapped in furs and leaning on his stick, took off his hat and bowed.

“It’s Lupin,” thought Prasville, “it’s Lupin, beyond a doubt.”

And he glanced toward the detectives, was nearly calling them, but the old gentleman explained:

“Yes, I thought the letters were good enough to warrant a few hours’ railway journey and the cost of two return tickets.”

“Two tickets?”

“One for me and the other for one of my friends.”

“One of your friends?”

“Yes, he left us a few minutes ago and reached the front part of the train through the corridor. He was in a great hurry.”