"You had no business to wake up."

"Your letter...."

"What letter?"

"The letter from you which a commissionaire brought me at the hotel."

"A letter from me? You're mad!"

"I assure you."

"Where is the letter?"

Wilson produced a sheet of note-paper and, by the light of his lantern, Shears read, in amazement:

"Get up at once, Wilson, and go to the Avenue Henri-Martin as fast as you can. The house is empty. Go in, inspect it, make out an exact plan and go back to bed.

"Holmlock Shears."