"I can do it, Monsieur Robert Darzac, because I know more than
you do!"

"Come! Come!" murmured Darzac, almost angrily.

"Have no fear! I shall know only what will benefit you."

"You must know nothing, young man, if you want me to be grateful."

Rouletabille shook his head, going close up to Darzac.

"Listen to what I am about to say," he said in a low tone, "and let
it give you confidence. You do not know the name of the murderer.
Mademoiselle Stangerson knows it; but only half of it; but I know
his two halves; I know the whole man!"

Robert Darzac opened his eyes, with a look that showed he had not
understood a word of what Rouletabille had said to him. At that
moment the conveyance arrived, driven by Frederic Larsan. Darzac
and the gendarme entered it, Larsan remaining on the driver's seat.
The prisoner was taken to Corbeil.





CHAPTER XXV

Rouletabille Goes on a Journey