“I know what you’re going to say. It occurred to me, too. You thought that Cockerill might have gone inside and quietly noosed Miss Chittering during the time that Mason was fooling around with that pigeon. I timed it the next night. He would have had about four minutes. I suppose it was barely possible—feasible, I mean, in a detective story sense. But apart from the improbability of it, there was one factor which I think ruled it out of court. I went along with Mason the next night to check up and he was quite emphatic about it.
“Yes. By the way, how did she get back into the building without being seen by anybody?”
“I don’t suppose she ever left the building. She probably sat, in the dark, on the next flight of stairs and waited till the coast was clear.”
“What a ruthless woman,” said Bohun. “And, incidentally, what a nerve.”
“A strong left wrist isn’t the only thing you develop in a Women’s Golf Championship,” said Hazlerigg.
III
“Darling,” said Anne Mildmay. “You remember that awful night.”
“Which awful night?” said Bob, looking up from what he was doing. “Oh, at Sevenoaks—yes.”
“Do you think I was drugged?”
“I don’t know,” said Bob. “You had a very advanced hangover the next morning.”
“But what would have been the point of it?”
“If you ask me,” said Bob, “it wasn’t drugs at all. It was two glasses of neat whisky coupled with the excitement.”
“And what was I supposed to be excited about?” demanded Anne coldly.
“The prospect of marrying a farmer,” said Bob.
Silence fell again on the little room, with its French window which opened on to an uncut lawn running down to a quiet river under a silver September sky.
“The joke of it is,” said Bob, “that I took up farming to get away from office work.” He wiped the ink off his finger on to one of the tassels of the tablecloth.
“Never mind,” said Anne. “Get on and finish that ‘Milk Marketing—Cows in Calf—Feeding Stuffs—1950–51—Estimated quantities’, and I’ll take it down to the post after tea.”
IV
That same afternoon, Bohun, back in the office, was drinking his tea (as a partner he now had it brought to him in a cup
“If Miss Cornel was mad,” he was saying, “then I’m mad, and you’re mad. We’re all of us mad.”
Bohun nodded.
“I’m glad she didn’t hang, though,” he said. “After she’d killed Smallbone—and the real reason, the
“Do you know,” said Mr. Craine. “I’m not sure that even now I quite understand about that rucksack. And who was the little man from the Left Luggage Office that Hazlerigg was going to subpœna?”
“I think,” said Bohun, “that that was the most truly remarkable thing about the whole business. The single thin, unbreakable thread of causation which joined the body of Marcus Smallbone to the Left Luggage Office at London Bridge Station. It turned on such a trivial series of events, and yet it was strong enough to cause the death of at least one innocent person.”
“Strong enough to bring Miss Cornel into the dock,” said Mr. Craine. “It seemed to me to be the only tangible evidence they had. I admit it never came to the test, because she pleaded guilty—but all that stuff about rolling screws and left wrists—Macrea would have made pretty short work of that.”