"How right you are, sir, but I'm suggesting that this was intricately plotted. Dovetails, every part: the tip-off to Sergeant Plant; the riddles; the theft at the Postal Museum; and the planting of the stamp in Motion's book. It was a high-risk undertaking, and the planning was worthy of the SAS. And it worked like a dream. The thief always intended to return the stamp after making monkeys out of everybody-ourselves and the Bloodhounds."
"With some success."
"True. But lets concentrate on the locked room."
"Good idea."
"Chummy knew a week in advance-"
There were limits to Diamond's tolerance. "For Christ's sake, John," he appealed to Wigfull. "Let's not call him 'Chummy.' We both agree Sid Towers is the man."
"Is he?" said Mr. Musgrave, showing more interest than he had for some minutes.
"He fits the frame, sir," said Diamond. "The silent man with a lot to prove to some of those motormouths in the Bloodhounds. Trained in security, so breaking into the Postal Museum wouldn't be such a problem. He'd know plenty about locks and bolts. An expert on Dickson Carr. And of course he was found in the boat. Either Towers or the killer must have found a way into that cabin, and the logic is that it was Towers and he was followed in there and killed. Agreed, John?"
Wigfull muttered his assent, peeved that Diamond had hijacked the narrative.
Mr. Musgrave said, "This is fine as far as it goes, but it's all circumstantial, isn't it?"
Keen as he was to lead the discussion again, Wigfull had no answer. He turned to Diamond.
"Everything I just mentioned is," Diamond admitted, and added, straight-faced, "unless Mr. Wigfull here has some evidence I'm not aware of."
Wigfull's eyes narrowed. The opportunity was there, and he still had nothing to say.
For Peter Diamond, the silence was as good as a fanfare. "In that case, I'd better show you mine," he announced. Resisting the flourish he might have made-there was no need- he took from his inside pocket the brown paper bag he had recovered from Jessica Shaw. He unfolded it. "This, gentlemen, was the bag Towers produced on Monday evening when Miss Chilmark was hyperventilating. I'm sure you heard about the incident. He handed the bag to Jessica Shaw, who knew what to do. She held it against Miss Chilmark's face and stopped the attack. Afterward, Mrs. Shaw kept the bag, in case of a recurrence. Miss Chilmark felt well enough to remain at the meeting, you see. In the confusion at the end, Mrs. Shaw popped it into her handbag and forgot about it. I recovered it from her this afternoon."
"Is it important?" asked the ACC.
"The bag on its own is not, sir. But if you look at it…" Diamond smoothed the bag against the surface of Wigfull's desk and handed it to Mr. Musgrave.
"There's writing."
Wigfull got up and came around the desk to look. "May I see?"
"Doesn't make a lot of sense," said Mr. Musgrave.
There were three lists of words in rows, written in an untidy hand in black ballpoint:
"They rhyme," said Wigfull. "They're rhyming words."
"Take a little time over it," Diamond suggested, as if he were coaching a five-year-old in reading.
Mr. Musgrave said, "Looks to me as if he was working on apiece of verse."
"The very thing I was about to say, sir," said Wigfull.
"Do you think he was composing another riddle?" said Mr. Musgrave.
"Look at the middle row," Diamond gently nudged them on. "What else rhymes with 'lotion'?"
"These other words?" said Wigfull.
"Apart from those other words."
"Ha-you're ahead of us," said Mr. Musgrave. "Motion. He wanted something to rhyme with Milo Motion. Good spotting, Peter. This does look like the notes for another cryptic riddle. So how about 'Jack'?"
" 'Attack'? " suggested Wigfull, still thinking about hyperventilation, and in some danger of succumbing to it himself.
" 'Black,' " said Mr. Musgrave. "Penny Black."
Diamond gave a nod. "That's my best guess, sir."
"And 'tomb'?"
"Locked room," Diamond guessed again.
"I'll buy that. Ha. Neat. So Towers was jotting down words to make his next press release. This isn't absolute proof, of course, but I'm satisfied, Peter. You've linked him to the crime."
Wigfull straightened in his chair. "Why didn't you show it to me before?" he demanded in a high, aggrieved tone. "It's evidence."
He was answered first with a long look, and then: "I got it from Mrs. Shaw less than an hour ago."
"Then she was withholding evidence."
"A paper bag?"
"If it's written on…"
"She hadn't noticed. Anyway, she'd forgotten about it. It was still in her handbag."
"Are you sure she hadn't noticed the writing?"
"Even if she had, why should she have thought it important?"
"Crafty old sod," said Mr. Musgrave. But it was Sid Towers he was talking about, not Jessica Shaw. "What's the old saying? 'Who knows most, speaks least.' "
Some of the steam dispersed as they all thought about silent Sid, dismissed by most of the Bloodhounds as a nonentity. This, surely, was the proof that he had stolen the world's most valuable stamp and devised a locked room puzzle capable of baffling the best minds.
John Wigfull's mind excepted.
"You were going to tell us how it was done," Mr. Musgrave prompted him.
Wigfull had a mountain to climb after that revelation. You could almost sense the effort of lacing his boots again and pulling on the rucksack. "Yes, sir."
"You're not going to keep us in suspense, I hope."
"No, sir." Manfully, Wigfull started again. "The crime, as I was saying, was meticulously planned. Sid Towers must have been working on it for weeks, if not months. He needed to find a way of getting inside the narrowboat when Milo Motion wasn't present. He had an opportunity to see the Mrs. Hudson for himself the previous Christmas, when the Bloodhounds held their party there."
"Aboard the boat?" said Mr. Musgrave. "Good place for a party."
"I checked, and he was certainly there, in spite of being so shy. I picture him at the party unwilling to mix, moving about the boat, looking at things. It's probable, isn't it, that a professional security officer like Towers would take an interest in the locks and bolts? I reckon he noted the type of padlock at that early stage. No doubt he'd come across such locks before. Probably knew they were supplied by Foxton's. If not, it was easy to note the name of the manufacturer and find out who stocked them."
"What was the point?" Mr. Musgrave asked.
"An amazingly obvious one. No disrespect, sir. Most of these locked room puzzles are obvious when they're explained. I think he went to Foxton's and bought one of those German padlocks himself. He waited for his chance to make a substitution."
"Good. I'm with you."
"Exactly when he made the switch I can't be sure. May have been months ago, or as late as the meeting before last."
"Are you saying he changed over the padlocks at the Bloodhounds?"
"Not exactly, sir." With a startling sense of drama for such a prosaic man, Wigfull pictured the scene. "Motion takes off his coat and hangs it on one of the coathooks near the door. Towers chooses a suitable moment to go to the gents. On the way he dips into Motion's overcoat pocket and finds the bunch of keys. He removes Milo's padlock key from the ring and replaces it with one of his own that fits the new padlock. Returns the keys to the pocket."
"Now he can unlock the boat."
"Right, sir. He leaves before Motion and drives fast to the boatyard to make sure he gets down there first. With the old key he unlocks the original padlock and replaces it with the one he bought."
"And when Motion gets back to his boat he uses the key on his ring to let himself in."
"In the usual way," said Wigfull, "unaware that the switch has been made."
"Neat," said Mr. Musgrave. "I like it."
John Wigfull beamed. "And of course Sid Towers is now in possession of a spare key. He can visit the boat anytime
he likes." He brought his hands together in a gesture of finality. Then in case it appeared he was applauding himself, he rubbed them vigorously as if using a drying machine in a public toilet.
"The locked room mystery solved," said Mr. Musgrave. "What do you say, Peter?"
Diamond digested what had been said and then gave a nod. "Full marks, John." He meant it sincerely. He was genuinely impressed. The explanation had no obvious flaw. "And the reason we didn't find the key on Towers's body is that the murderer must have taken it with him."
"Or her," Wigfull was quick to point out.
Mr. Musgrave said to Wigfull, "You'd already thought of that, I'm sure."
Wigfull smiled. He'd scaled his mountain and was on the summit posing for pictures.
Mr. Musgrave reached for the padlock again. "It doesn't look as if it was bought recently," he said, turning it over in his hand.
Wigfull had an answer to that. "He'll have done what any forger of coins does-roughed it up a bit to take off the sheen. They stick them in a bag with other metal objects and shake them about. Sometimes they bury them. They soon look worn."
Diamond had never judged Wigfull as short in intelligence; it was the sense of humor that was lacking. This wasn't an occasion for sour grapes. The man had just made a crucial contribution to the case, to his case, as well as Wigfull's own. "Wish I'd thought of it," he admitted. "I didn't come near to working it out."
Chapter Twenty-two
For Julie's benefit, as he put it, Diamond had been over Wigfull's explanation of the locked boat mystery point by point, and they could find no flaw. The substituted padlock and key answered every problem.
Finally he said, "I'm thinking of handing the whole thing over to Wigfull."
Julie blinked and frowned. She had sacrificed her lunch hour attending the postmortem, an unsavory duty she shouldn't have been lumbered with, and now he hit her with this. "What do you mean? Let him take over the murder inquiry?"
"Locked rooms and cryptic rhymes. It isn't my scene, Julie. He's motoring through it. Firing on all cylinders while I'm… I'm stuck in the pits."
She stared across the office at the big man as he stood by the window watching the traffic in Manvers Street. "What does that make me-a worn tire?"
Diamond was not easy to work with, but his saving grace was a sense of humor. Such a remark would usually produce a smile, whatever the pressures he was under. This time he sighed. He had taken heavy punishment. Actually he wasn't indulging in self-pity; this was about confidence. At this minute he genuinely believed John Wigfull would make a better fist of the case than he could. The strongest comment Julie could find to add was, "If you do anything so dumb, I'll ask for a transfer."
He turned to look at her, eyes widening.
"We've put all that Dickson Carr stuff behind us," Julie insisted. "We're down to brute murder. Nothing unexpected came out of the postmortem. No unexplained injuries. He was bashed over the head a couple of times with some solid implement. That isn't exactly a master criminal at work."
This earned a glint of amusement.
She added, "And you said yourself that the locked room mystery isn't a mystery anymore."
"Thanks to Wigfull."
"All right, thanks to him. Is that important? What we're left with is a straightforward case of murder."
"About as straightforward as a plate of spaghetti."
Julie grinned and held out her hands in appeal. "Come on, you've got the tricky stuff out of the way. We know Sid Towers stole the Penny Black and wrote those rhymes. And incidentally, that was your persistence that gave us the proof, not John Wigfull's."
This tribute didn't register anything with Diamond.
Staunchly, Julie continued to put the case in its most promising perspective. "Sid thought up this brilliant plot and carried it out, and then he was killed. We've got to find the killer. Is it too much to believe that it was a casual murder?"
He said a flat "Yes."
"Then surely it must have been triggered by Sid's actions." She looked toward Diamond, inviting him to pick up the thread.
But he would not.
So she pressed on. "I'm suggesting that one of the Bloodhounds felt deeply angered or threatened by what happened at the meeting."
There was, at least, a response from Diamond, even if it was not helpful. "The stamp turning up in Milo's book?" he said in a hollow tone. "Where's the threat in that?"
Julie turned a shade more pink, not in reaction to Diamond's ill humor, but because a theory-a persuasive theory- was forming in her brain. "Let's not forget that the stamp is worth millions. Suppose Sid wasn't working alone. What if he had an accomplice?"
He gave her a look that was only a fraction less bleak.
She added, "And what if their plan was to demand a ransom for the stamp?"
"Then they fell out, you mean?"
"Exactly. It wasn't in the plan to return the stamp unless and until they got a thumping great payoff. But Sid wasn't the hard man he made himself out to be. He got nervous and decided to return the stamp. The accomplice would have been shocked and deeply angered when it turned up in the book as it did, without a penny changing hands. It's enough, isn't it, to provide a motive for murder?"
Diamond was less excited about the theory. "It would be, if you can believe Sid capable of teaming up with anyone. My judgment is that he was a loner. That flat of his, upstairs at the end of a cul-de-sac; the job, the night work, the shyness everyone mentions. I can't see a man like that confiding what he thinks of the bloody weather, so how does he get around to teaming up with a fellow criminal? Sorry, Julie. I don't buy it."
"Why was he killed, then? Can you think of a reason?"
If nothing else, her persistence finally nudged him out of that negative mood. His brown eyes held her for a moment, looked away, and then came back to her. "Could have been something he found out. I suppose if one of them-one of the Bloodhounds-had a dodgy past, a criminal record, say, a man in Sid's line of work might have got to hear about it. Have you checked their form?"
That evening, Bath's glitterati descended on the Walsingham Gallery in numbers. Jessica Shaw's private views were not usually so well patronized, but since the papers were full of the Narrowboat Murder and it was known that the victim had attended a Bloodhounds meeting the same evening and Jessica was a member, the chance of some inside information was too good to miss. With luck, some of her fellow members would also be invited. There was even the thrilling possibility of rubbing shoulders with a murderer-for it was stated in the papers that everyone at Monday night's meeting in the crypt of St. Michael's had been interviewed by the police. So the buck's fizz flowed and the eyes darted eagerly about, looking not so much at the art as the other guests. As some wit pointed out, it would have assisted everyone if instead of using those little red stickers to mark paintings that were sold, Jessica had attached them to her Bloodhound friends.
The minute she arrived, Shirley-Ann heard an unmistakable voice declaring in syllables brought to perfection by generations of privilege that most of the art on display was absolute balls.
On tiptoe to see over the mass of expensively coiffed heads, she glimpsed a black beret and moved determinedly in that direction. Gratifyingly, Rupert recognized her at once. It didn't matter that he greeted her as "Sally-Ann"; the warmth was genuine. He introduced the people beside him in his own florid fashion.
"My dear, in my endless quest for culture I once located this unlikely duo in a watering hole in Bradford on Avon, of all places. Tonight I met them in the Saracen's, sinking one or two before the party. Stephen and Pat Volk. Stephen's a screen-writer. and a crafty old fox, he won't mind me telling you. Remember that extraordinary hoax about psychic phenomena that went out on television one Halloween and petrified the nation? With Parkinson playing it straight as the presenter. What the devil was it called, Steve?"
"Ghostwatch." The playwright, reassuringly substantial, broad of shoulder, scant of hair, and dressed entirely in black, with ow
lish glasses, seemed subdued by Rupert's eloquence, but who was not?
Almost by definition, the most brilliant hoaxers were going to be self-effacing, Shirley-Ann mused.
'"Heads must roll at the BBC!' Loved it," Rupert was crowing. "And speaking of heads, this is Pat, who sculpts them. Marvelous, strong, archetypal heads in amazing colors. If you can force a way through this drunken mob, as you must, you'll see her work upstairs. I was on the point of telling her she's the only one of this lot I'd consider buying."
Pat Volk smiled wryly. Rupert might talk like a patron of the arts, but his scuffed leather jacket, patched jeans, and the black beret speckled with dandruff didn't inspire confidence. Shirley-Ann smiled back. It was about all anyone could do when Rupert was in full flow.
"Sally-Ann joined the Bloodhounds just as we all became suspects in a murder case," he continued, projecting loudly enough for all the room to hear. "She's incredibly well informed about detective stories. You could ask her anything at all and she'd know. Try her. Here's one at random. Name the poison Agatha Christie used most commonly in her books."
Shirley-Ann felt as if half the room had suspended conversation to hear the answer. "Cyanide?"
"I wouldn't know, my dear," said Rupert, displaying his gaps in a fiendish grin, "but I'm sure it's a splendidly efficient poison, quite impossible to trace in buck's fizz."
From somewhere to Shirley-Ann's left, a familiar voice spoke up. "Of course she's right. It occurs in fourteen, of the books, twice as many as morphine, which comes second." Milo, back in circulation and seeming no worse for his skirmish with the police.
"Ah, perpetual Motion," said Rupert. "The man's unstoppable. Why don't you join us, Milo? Hit Sally-Ann with some really searching questions."
Shirley-Ann saw an opportunity and seized it. "If it doesn't seem frightfully rude, I forgot to pick up a catalogue." She turned her back and was away. Talking to strangers was preferable to that sort of embarrassment. How could she have been so misguided as to think Rupert was a safe haven?
She had not traveled far across the room when further progress was barred by a plate of canapes. Predictably, Jessica stood out from her guests in a gorgeous outfit, a shimmering black sequin jacket over a peacock-blue dress. "I was on my way to rescue you," she said. "That Rupert! Cyanide in the buck's fizz! Believe me, I won't be wasting good poison on him. I'll strangle him."
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