The Superintendent had sent one of his men for a stretcher, and the remains were lifted on and carried slowly down to the waiting taxi. With an exchange of good-nights, the local men withdrew, leaving Inspector French, Mr. Duke, Orchard, and the two plain-clothes men from the Yard in charge of the premises. CHAPTER II THE FIRM OF DUKE AND PEABODY WHEN Inspector French ushered the clerk, Orchard, into the inner office, they found Mr. Duke pacing the floor with an expression of utter mystification imprinted on his features. “I say, Inspector, here’s a puzzle,” he cried. “I happened to look behind the safe door, and I find it has been opened with a key. I thought at first it had been broken or forced or the lock somehow picked. But I see it is unlocked.” “Yes, I noticed that, sir,” French answered. “But I don’t follow you. What is the mystery about that?” “Why, the key, of course. To my certain knowledge there were only two keys in existence. One I keep on my ring, which is chained to my belt and never leaves me day nor night. There it is. The other is lodged with my bankers, where no one could possibly get at it. Now, where did the thief get the key that is now in the lock?” “That is one of the things we have to find out,” French replied. “You may perhaps think it strange, but a point of that kind, which at first seems to deepen the mystery, often proves a blessing in disguise. It provides another point of attack, you understand, and frequently it narrows down the area of inquiry. You haven’t touched the key, I hope?” “No. I remembered what you said about finger prints.” “Good. Now, gentlemen, if you will please sit down, I want to ask you a few questions. I’ll take you first, Mr. Orchard. I have your name, and your address is Bloomsbury Square. Now tell me, is that your home?”