He showed the letter to M. Filleul.
"Pooh! Stuff and nonsense!" cried the magistrate. "I hope you won't let that prevent you—"
"From telling you what I know? No, Monsieur le Juge d'Instruction. I have given my word and I shall keep it. In less than ten minutes, you shall know—a part of the truth."
"A part?"
"Yes, in my opinion, Lupin's hiding-place does not constitute the whole of the problem. Far from it. But we shall see later on."
"M. Beautrelet, nothing that you do could astonish me now. But how were you able to discover—?"
"Oh, in a very natural way! In the letter from old man Harlington to M. Etienne de Vaudreix, or rather to Lupin—"
"The intercepted letter?"
"Yes. There is a phrase which always puzzled me. After saying that the pictures are to be forwarded as arranged, he go
