"Everything, but not that."
"But . . ."
"Later on."
"You're mad! Why?"
"I have no proofs. Later, when you are free, we will hunt together. Besides, what's the good? And then, really, I can't tell you."
"You're afraid of him?"
"Yes."
"Very well," said Lupin. "After all, that's not the most urgent matter. As to the rest, you've made up your mind to speak?"
"Without reserve."
"Well, then, answer. Who is Pierre Leduc?"
"Hermann IV., Grand Duke of Zweibrucken-Veldenz, Prince of Berncastel, Count of Fistingen, Lord of Wiesbaden and other places."
Lupin felt a thrill of joy at learning that his protégé was definitely not the son of a pork-butcher!
"The devil!" he muttered. "So we have a handle to our name! . . . As far as I remember, the Grand-duchy of Zweibrucken-Veldenz
