He questioned him first about the Charolais, their appearance, their actions, especially about Bernard's attempt to steal the pendant, and the theft of the motor-cars.
"I have been wondering whether M.Charolais might not have been Arsene Lupin himself," said the Duke.
"It's quite possible," said Guerchard.

"There seem to be no limits whatever to Lupin's powers of disguising himself.

My colleague, Ganimard, has come across him at least three times that he knows of, as a different person.

And no single time could he be sure that it was the same man.

Of course, he had a feeling that he was in contact with some one he had met before, but that was all.