“It’s a German make.”

“I know, sir. But this country’s absolutely full of Continental makes of guns. All the Americans brought them back and so did our chaps. You can’t go by that.”

“True enough. Any other lines of inquiry?”

“There’s got to be a motive. If there’s anything in this theory at all, it means that last Friday’s business wasn’t a mere joke, and wasn’t an ordinary hold-up, it was a cold-blooded attempt at murder. Somebody tried to murder Miss Blacklock. Now why? It seems to me that if anyone knows the answer to that it must be Miss Blacklock herself.”

“I understand she rather poured cold water on that idea?”

“She poured cold water on the idea that Rudi Scherz wanted to murder her. And she was quite right. And there’s another thing, sir.”

“Yes?”

“Somebody might try again.”

“That would certainly prove the truth of the theory,” said the Chief Constable dryly. “By the way, look after Miss Marple, won’t you?”

“Miss Marple? Why?”

“I gather she is taking up residence at the Vicarage in Chipping Cleghorn and coming into Medenham Wells twice a week for her treatments. It seems that Mrs. What’shername is the daughter of an old friend of Miss Marple’s. Good sporting instincts, that old bean. Oh, well, I suppose she hasn’t much excitement in her life and sniffing round after possible murderers gives her a kick.”

“I wish she wasn’t coming,” said Craddock seriously.

“Going to get under your feet?”

“Not that, sir, but she’s a nice old thing. I shouldn’t like anything to happen to her … always supposing, I mean, that there’s anything in this theory.”

Nine

CONCERNING A DOOR

I

“I’m sorry to bother you again, Miss Blacklock—”

“Oh, it doesn’t matter. I suppose, as the inquest was adjourned for a week, you’re hoping to get more evidence?”

Detective-Inspector Craddock nodded.

“To begin with, Miss Blacklock, Rudi Scherz was not the son of the proprietor of the Hotel des Alpes at Montreux. He seems to have started his career as an orderly in a hospital at Berne. A good many of the patients missed small pieces of jewellery. Under another name he was a waiter at one of the small winter sports places. His speciality there was making out duplicate bills in the restaurant with items on one that didn’t appear on the other. The difference, of course, went into his pocket. After that he was in a department store in Zürich. There losses from shoplifting were rather above the average whilst he was with them. It seems likely that the shoplifting wasn’t entirely due to customers.”

“He was a picker up of unconsidered trifles, in fact?” said Miss Blacklock dryly. “Then I was right in thinking that I had not seen him before?”

“You were quite right—no doubt you were pointed out to him at the Royal Spa Hotel and he pretended to recognize you. The Swiss police had begun to make his own country rather too hot for him, and he came over here with a very nice set of forged papers and took a job at the Royal Spa.”