“In an hour?”
“Yes; within that time, Arsène Lupin solved the problem that you placed before him.”
“I.... placed before him—”
“Yes, Arsène Lupin or Horace Velmont—same thing.”
“I thought so. Ah! the scoundrel!”
“Now, let us see,” said Holmes, “last night at ten o’clock, you furnished Lupin with the information that he lacked, and that he had been seeking for many weeks. During the night, he found time to solve the problem, collect his men, and rob the castle. I shall be quite as expeditious.”
He walked from end to end of the room, in deep thought, then sat down, crossed his long legs and closed his eyes.
Devanne waited, quite embarrassed. Thought he: “Is the man asleep? Or is he only meditating?” However, he left the room to give some orders, and when he returned he found the detective on his knees scrutinizing the carpet at the foot of the stairs in the gallery.
“What is it?” he enquired.
“Look.... there.... spots from a candle.”