That was a possibility. But there were far too many combinations and no common reference point. In breaking a simple code in which letters are converted to numbers, you can start with the knowledge that the letter ‘e’ appears most frequently in the English language and preliminarily assign that value to the most commonly occurring numbers in the code. But here, they had far too few numbers – and they were combined with words, which suggested that the numbers did not mean anything other than what they appeared to be, cryptic though that meaning was.

It could still be a location, but this number eliminated longitude or latitude. One or more addresses?

Pulaski said, ‘Beaufort wasn’t killed underground.’

Rhyme pointed out, ‘No, the unsub’s motive was different here: to kill TT Gordon specifically or at least somebody in the parlor. He didn’t need to follow his standard MO. Now, let’s look at what else you collected, Sachs.’

She and Cooper walked to the examination table. Both donned gloves and face masks.

‘No prints, finger or footwear,’ she said. ‘ME has the blood workup. I told him we needed the results yesterday. He said it was all hands on deck.’

‘Other trace?’ Rhyme asked.

Sachs nodded at several bags.

The criminalist barked, ‘Mel, get on that.’

As Cooper picked up and examined each one, then analyzed the contents, Sachs ran through the other pictures of the scene. Eddie Beaufort, hands cuffed behind him and lying on his back, like the others. It was obvious he’d suffered gastrointestinal symptoms and severe vomiting.

The phone rang with a familiar number.

Sachs gave a laugh. ‘That’s as ASAP as it gets.’

‘Doctor, it’s Lincoln Rhyme,’ he said to the medical examiner. ‘What do you have?’

‘Odd, Captain.’ Using Rhyme’s old title. It never failed to be both jarring and familiar.

‘How? Exactly.’

‘The victim was killed by amatoxin alpha-amanitin.’

‘Death cap mushroom,’ Cooper said. ‘Amanita phalloides.’

‘That’s it,’ the medical examiner said.

Rhyme knew them well. Amanitas are known for three things: a smell like honey, a very pleasant taste and the ability to kill more efficiently than any other fungus on earth.

‘And the odd part?’

‘The dosage. I’ve never seen a concentration this high. Usually it takes days to die, but he lasted about an hour I’d guess.’

‘And a pretty bad hour,’ Sachs said.

‘Well, that’s right,’ said the medical examiner, as if this had never occurred to him.

‘Any other substances?’

‘More propofol. Just like the others.’

‘Anything else?’

‘Nope.’

Rhyme grimaced and began to hit disconnect. Sachs called, ‘Thanks.’

‘You’re—’

Click.

‘Keep going, Mel,’ Rhyme said.

Cooper ran another sample of trace through the gas chromatograph/mass spectrometer. ‘This is—’

‘Don’t say “odd”,’ Rhyme snapped. ‘I’ve had enough odd.’

‘Troubling. That was the word.’

‘Go on.’

‘Nitrocellulose, di-ethylene glycol dinitrate, dibutyl phthalate, diphenylamine, potassium chloride, graphite.’

Rhyme frowned. ‘How much?’

‘A lot.’