“Now, veronal, for instance——” I proceeded.
But, strangely enough, she didn’t seem interested in veronal. Instead she changed the subject, and asked me if it was true that there were certain poisons so rare as to baffle detection.
“Ah!” I said. “You’ve been reading detective stories.”
She admitted that she had.
“The essence of a detective story,” I said, “is to have a rare poison—if possible something from South America, that nobody has ever heard of—something that one obscure tribe of savages use to poison their arrows with. Death is instantaneous, and Western science is powerless to detect it. That is the kind of thing you mean?”
“Yes. Is there really such a thing?”
I shook my head regretfully.
“I’m afraid there isn’t. There’s curare, of course.”
I told her a good deal about curare, but she seemed to have lost interest once more. She asked me if I had any in my poison cupboard, and when I replied in the negative I fancy I fell in her estimation.
She said she must be getting back, and I saw her out at the surgery door just as the luncheon gong went.