audience, Jowett took a piece of paper from an inside pocket and handed it to Cribb.
It was a photo-engraving cut from a magazine. Two men in bowler hats were shown standing at the entrance of what looked like a hotel. The caption read: âThe Annual Conference of the Portrait Photographersâ League, at Brighton, on 12th March. The Hon. P. R. Deacon-Pratt, President and Mr H. Cromer, Vice-Chairman.â The date and Cromerâs name were ringed in red ink. More significantly, an arrow had been drawn pointing to the waistcoat of the figure on the right. A key, small, but clearly visible, was shown attached to the watch-chain looped across the front.
âIt was cut from the Photographic Journal of 24th March,â said Jowett. âThe Home Secretary received it on Monday. It came in an envelope with a West Central postmark. There was no letter of explanation.â
âAn explanation isnât necessary,â said Cribb. âSomeone studied Miriam Cromerâs confession and remembered this. Thereâs no doubt, I take it, that this is one of the keys to the poison cabinet?â
âNo doubt whatsoever. The Home Office have studied it minutely. I saw it myself under magnification and compared it with the key found in Percevalâs pocket. The Germans are clever locksmiths, Cribb. That key and its twin were individually cut for the lock on that cabinet. The pattern is intricate, make no mistake. Triple layers of metal, divergent facesâjargon to me, but it means we can eliminate the possibility of a copy having been made.â
âWell, as Cromer was wearing one key on his waistcoat in Brighton, his wife must have opened the cabinet with the other. Is it possible Perceval mislaid it?â
Jowett shook his head. âI just mentioned, didnât I, that it was on a ring with his other keys. If Perceval had mislaid them, he could not have let himself into the studio that morning. I am assured he did.â
Cribbâs mind sifted through possibilities. âIf he removed his jacket while he was working with chemicalsââ
âHe kept the key-ring in his trouser pocket. It was found there on the body. And we can discount the possibility that she simply asked to borrow his key to the cabinet. That would have alerted him to her intention. She had no conceivable reason for opening the cabinet except to obtain poison. Perceval was no fool, Cribb. He was well aware of the risk he ran in blackmailing her. He was too astute by far to present her with the means of destroying him. Letâs not forget, either, that Miriam Cromer claimed to have taken the poison from the cabinet at lunch time, when Perceval was out. When she saw him next, he was a dead man. If she used Percevalâs key to obtain the poison, how did she return it to the pocket of his trousers after he was dead?â
Cribb thought for a moment. âJust a minute, sir. You said just now that when the doctor asked about poison, Miriam Cromer unlocked the cabinet and showed him the bottle of cyanide. She must have had a key in her possession.â
Jowett knocked ash into Cribbâs coal-bucket. âObviously you are coming to grips with the problem, Sergeant, but the answer isnât there, Iâm afraid. You see, I am at a slight advantage here. I have read Dr Eagleâs deposition. He states categorically that when he inquired about the cyanide, Mrs Cromer told him the bottle was kept locked in the poison cabinet. He asked to see it and she said she would need Percevalâs key to open it. The doctor himself removed the keys from the dead manâs trouser pocket. Afterwards he replaced them. The whole thing defies rational explanation.â
âHas anyone asked Miriam Cromer about it?â
âNo.â
âWhy not? She pleaded guilty. She of all people knows what happened.â
âNo, it wouldnât do.â
Cribb rubbed his chin, surprised that a straightforward suggestion