“If I knew, my dear Prosper, my task would be at an end, for then I would know who committed the robbery. But we will continue our searches. I have finally procured evidence which will sooner or later become convincing proof. I have heretofore only made deductions more or less probable; I now possess knowledge which proves that I was not mistaken. I walked in darkness: now I have a light to guide me.”
As Prosper listened to M. Verduret’s reassuring words, he felt hope arising in his breast.
“Now,” said M. Verduret, “we must take advantage of this evidence, gained by the imprudence of our enemies, without delay. We will begin with the porter.”
He opened the door and called out:
“I say, my good man, step here a moment.”
The porter entered, looking very much surprised at the authority exercised over his lodger by this stranger.
“Who gave you this letter?” said M. Verduret.
“A messenger, who said he was paid for bringing it.”
“Do you know him?”
“I know him well; he is the errand-runner who keeps his cart at the corner of the Rue Pigalle.”