‘I don’t want to read it later, thanks. I can’t understand why you’re doing this, Matt. What’s the point?’

‘What’s the point? It says that members of families vulnerable to schizophrenia can carry the genes for it, while not being schizophrenic themselves. They’re called “Presumed Obligate Carriers”.’

‘Matt, you don’t know anything about this stuff.’

‘I’m trying to find out. Look, there’s a bit of research here that talks about anticipation.’

‘What?’

‘The progress of an illness across several generations. They studied families affected by schizophrenia and found that, in each generation, more family members were hospitalized with the condition at an earlier age, and with increasing severity.’

‘And your conclusion, Doctor . . . ?’

Matt pressed a couple of keys, and the laser printer whirred into life. He turned to face his brother.

‘My conclusion is, I reckon my kids could be eight times more likely than average to have schizophrenia.’

Ben shook his head. ‘It’s still a small chance, Matt. We were told that one in every hundred people suffers from schizophrenia. So even taking heredity into account, that’s only a maximum risk of, what . . . eight per cent?’

‘It’s a bit less than our risk, admittedly.’

‘Ours?’

‘Yours and mine, little brother. The children or siblings of schizophrenics can have as high as a thirteen per cent chance of developing the disease.’

Matt took a couple of sheets off the printer, stapled them together and held them out to his brother. Ben didn’t take them.

‘You actually believe all this stuff?’

‘Look at it, won’t you?’

But Ben shook his head and sat back down on the arm of the chair. Meg groaned and looked up at him accusingly with one tired eye. She was a dog who liked peace. Raising your voice in her sleeping area just wasn’t on.

Matt held up the pages again. ‘They think some families might lack a genetic code that counteracts the disease. You know, I’m wondering now if Grandma had schizophrenic tendencies. She had some strange habits – do you remember? But everyone in the family used to talk about her as if she was only a bit eccentric.’

‘I do remember her being rather odd, but that doesn’t mean a thing. It certainly doesn’t mean you’ll pass something on to the girls.’

‘You know, I’m trying to picture it,’ said Matt. ‘I can see myself, forever on the lookout for early-warning signs in Amy and Josie. It would be sensible, in a way – early intervention and treatment would result in the best prognosis. But what kind of effect would it have on the girls if we were watching all the time for telltale signs?’

Ben wasn’t sure who his brother was talking to now. He might as well be alone in the office with the dog.