Back at the pool there was no one around so I sat down and contemplated the water. I had waited for Jill Salton to come to the point and all she had come up with was Jackson. Very curious. I thought of Jackson and Jill Salton, separately and in conjunction, and came to no conclusion.

Presently John came along. ‘Mrs Salton says to tell you she’s in the kitchen if you’d like to go along there.’

‘Where’s the kitchen?’

He told me. He had taken off his white coat and was dressed neatly in smart civvies. ‘Are you going off duty now, John?’

‘Yes, sir,’ he said stolidly.

‘Were you here the day Mr Salton walked out – the last day he was seen alive?’

‘Yes, sir.’

‘Do you know what Mr and Mrs Salton talked about just before he left?’

There was a sudden widening of his eyes, a movement quickly cancelled. He said quietly, ‘I don’t talk about the doings of my employer, sir.’

One in the eye for Kemp. I ought to have known not to pump the servants. Christ, what a lousy job I had. He stared at me steadily with defiant brown eyes, daring me to make something of it. He knew, all right! He knew what the Saltons had quarrelled about. But he wasn’t telling.

I said, ‘That’s good, John. Keep it that way.’

‘Is that all, sir?’

‘Yes.’ He turned away and I said, ‘How long have you worked for the Saltons?’

He was walking away as he said without turning his head, ‘Twenty-two years. It’s twenty-two years since I started with Mr Salton.’

I watched him until he was out of sight and thought what a right bastard I was, then I went into the changing room, showered, dressed and headed for the kitchen.

It was exactly what you’d expect to find in a house like that: a lot of stainless steel, eye-level ovens, islanded preparation counters, all gleaming and clean as a whistle. Jill Salton had changed, too. She was wearing a short frock, a simple little number you can buy anywhere for $1,000. As I arrived she said, ‘How do you like your martinis?’

I’m not a martini mystic. I shrugged and said, ‘As they come.’

‘You must get a lot of different martinis that way,’ she observed, and poured a healthy slug from a gin bottle into a shaker.

‘I like variety.’

She mixed the drinks and poured them, strained through cracked ice into chilled glasses taken from the refrigerator. ‘How often do you see my uncle?’

I smiled. ‘As little as possible. We don’t exactly rub shoulders.’

She handed me a glass. ‘He thinks a lot of you. He said so this afternoon.’

I sipped the martini. It was very good. ‘Face to face?’

‘Via satellite. He sang your praises a lot. He says you’re the best man in the business.’