There was silence in the incident room for a moment before Coleridge added, “And Sally is a very, very strong woman.”

“So Sally’s the killer, then?” Trisha said with a hint of exasperation. “That’s an awfully big supposition to make from one little comment.”

“I am not supposing anything, constable. I’m ruminating.”

Ruminating? Did he speak like that for a joke? Who ruminated? People thought, they considered, they might even occasionally ponder, but nobody had ruminated for fifty years.

“Sally chose to use a phrase that exactly describes the murder. She said ‘stick a knife in someone’s head’. We have to consider the implications of that.”

“Well, how about considering this, sir…” Trisha fought down the feeling she had in her stomach that she might be being defensive on Sally’s behalf out of some absurd sisterly and sexual solidarity. She truly believed that she would as happily convict a lesbian as any other person… On the other hand she did rather resent the fact that people were so eager to suspect Sally.

“She’s very strong,” they kept saying. “Very very strong.”

It wasn’t Sally’s fault that she was strong and muscular. Trisha herself would have loved to have been that strong. Although perhaps not quite as muscular.

“Go on, Patricia,” said Coleridge.

“Well, I was just wondering whether perhaps Moon wanted us to be reminded of what Sally had said. Perhaps she said all that stuff in the confession box because she wanted us to ruminate along the lines that you are ruminating along, sir.”

Coleridge raised a thoughtful eyebrow. “That is also a possibility,” he conceded, “and one upon which we must certainly ru- which we must certainly bear in mind.”

They turned their attention back to the screen.

DAY EIGHTEEN. 8.15 p.m.

Moon walked out of the confession box, having made her little speech about Sally, and announced her intention of getting immediately “shitfaced”.

“I’m going to go large,” she said, pulling the ring on a can of Special Brew. “I’m mad for it. I’m going to get shitfaced and rat-arsed!”

“Funny that, isn’t it?” Jazz said. “How we choose to describe having a good night.”

“You what?” said Moon.

“Funny way of describing a party, Moon,” he said.

“You what, Jazz?”

Jazz, ever watchful for opportunities whereby he could work on his patter and continue what he saw as his ongoing public audition for a career in comedy, had spotted what he thought was a fruitful opening. “Well, the English language is the most extensive in the world, but that’s the best you can do to describe having a good time. Tonight I’m going to have such a good time that it will be as if my face was covered in shit! My mood will resemble that of a rat’s arse! What’s all that about, then?”

“Eh?” said Moon.

Dervla tried to be supportive. “Very amusing, Jazz,” she said, opening a bottle of wine. “I’d laugh but I’m not yet sufficiently shitfaced.” And she smiled, hugging herself as if she had a special secret.

“Kelly 1. Dervla 2.” The secret hand had written in the condensation. “Hang in there, Gorgeous. XXX.”

The recipient of this little love note grinned broadly through the toothpaste foam.

So now she had risen to second place in the affections of the public. Not bad at all after only two and a half weeks. Only Kelly was ahead of her and Dervla felt far better equipped to stay the course than she believed Kelly was. After all, it was going to be a long, long game for those who survived, and Dervla was confident in her reserves of inner strength. Kelly, she felt, was not so well equipped for the struggle. She was too open, too sweet, too vulnerable, not so mentally attuned to stay the distance. Dervla felt that all she had to do was hang on. If she could just survive the process, she would win the game.

That was all she had to do.

Survive.

Jazz broke in on Dervla’s reverie. “So’re you going to get shitfaced too, then, Dervo?” he said, throwing a friendly arm around her. “Can I join you?”

“I’d be delighted, kind sir,” she replied.

Jazz’s smooth, beautiful, scented face smelt sweet close to hers, his arm was strong.

“I never heard you swear before, Dervs,” he laughed. “You’re loosening up, my darling.”

“Ah, to be sure, even us nuns like to let our wimples down occasionally.”

Jazz had been working up a little idea and, encouraged by Dervla’s friendly attitude, he decided to give it a trial run. “You know what?” he said. “You give so much away about yourself when you brush your teeth.”

Dervla almost leapt away from him. In fact, she jumped so suddenly that she caused them both to spill their drinks. Everybody turned in surprise.

“What the fuck do you know about me brushing my teeth?” she snapped angrily. It was rare that anybody heard Dervla say “fuck”.

“Here, steady on, girl,” said Garry. “Mind the language. I ain’t as rough as you, you know.”

Dervla appeared shattered. She tried to collect herself. “I mean, what do you mean, Jazz? What about me brushing my teeth?”

Jazz struggled for words, confused by her defensive reaction. “Well, not just you, Dervs,” he said. “I mean anybody, what I’m saying is people’s toothbrushes give a lot away about them.”

“Oh, anybody,” Dervla said. “So it’s not like you’ve been watching me brush my teeth or anything?”

Now it was Jazz’s turn to react. “What you saying, girl? That I’m some sort of tooth pervert? I never seen none of you brushing your teeth, right? On account of the fact that when I ablute, girl, I ablute alone, it’s a personal thing, OK? Because my body is a temple and I go there to worship.”

They all laughed and Dervla apologized. The moment passed, and Jazz pressed on with his comic material.

“What I’m saying, right, is that I ain’t never seen none of you brush your teeth. But I bet I know who everybody’s brush belongs to.”

This caused a moment of semi-drunken attention. From everyone, that is, except Hamish and Kelly. Kelly was already too far gone to take much interest in the conversation, and Hamish was too busy taking an interest in Kelly. Hamish had come into the house with the intention of having sex on television and in Kelly he was scenting a possible opportunity. He had put his hand on Kelly’s knee and she was giggling.

Meanwhile, Jazz expanded on his theme. “Like there was a time,” he continued, “when a toothbrush was a functional item, they was all the same, man, there was different colours, but that was it. Now your toothbrush is a fashion statement, man! We are talking a designer commodity here!”

“Stop waffling and get on with it,” said David. “Whose brush is whose?”

“Just setting the scene, guy, just setting the scene.”

“Whose brush is whose?”

“Well, Gazzer’s has gotta be the one like mine. It’s hip, it’s flash, it’s well hard and it’s the business! It’s got shock absorbers, man! It’s got a big soft round aerodynamically palm-friendly handle, rear suspension and a detachable head. It’s got a spring-loaded crumple zone at the front, it looks like a ray gun, and it’s in Chelsea’s away colours. Am I right, Gazz?”

“Fuck me, you’re Sherlock fucking Holmes, Jazz.”

“Yes, I am, guy, because it is el-e-fucking-mentary. Now, Dervo, you got the one with the age-fading stripe, that’s what I reckon.”

Dervla attempted to maintain a poker face. “Why’s that, Jazz?”

“’Cos you are one fastidious lady, OK? You are sweet and clean and you don’t want no dirty old worn-out thing stuck in your mouth.”

“Shame!” shouted Gazzer, at which Dervla blushed.

“Shut up, Gazz,” Jazz admonished. “Dervo is a fucking lady, so don’t you go making no off-colour comments implying no blow jobs, all right? Anyway, the point is, am I right, girl? When you was in the chemist and you was buying a brush for your perfect pearly toothypegs, did you choose a basic bristle or did you choose the one what tells you when it’s time to buy a new one?”