‘Yes. He hadn’t actually been with these precious Kans. He says he was valet to an English artillery officer who’d picked him up in America. He says he was friendly with the Kans’ servants. He says that when his employer left Australia he applied to Kan for a job. But the Kans were winging their way to Japan. Markins said he’d like to try his luck in New Zealand and Kan remembered Flossie moaning about the servant problem in this country. Hence, the letter. That’s Kan’s story. The whole thing looks damned fishy to me. Markins, an efficient, well-trained servant, could have taken a job anywhere. Beyond the fact that he was born British but has an American passport we know nothing about him. He gave the name of his American employers but doesn’t know their present address.’

‘I think I should tell you,’ said Alleyn, ‘that the American employers have been traced for us and verify the story.’

This produced an impression. Fabian said, ‘Not Understood, or The Modest Detective! I take back some of my remarks about him. Only some,’ he added. ‘I still maintain that, taking him by and large, our Mr Jackson is almost certifiable.’

‘It makes no difference,’ Douglas said. ‘It proves nothing. My case rests on pretty firm ground, as I think you’ll agree, sir, when you’ve heard it.’

‘Do remember, Douglas,’ Fabian murmured, ‘that Mr Alleyn has seen the files.’

‘I realize that, but God knows what sort of a hash they’ve made of it. Now, I don’t want to be unnecessarily hard on the dead,’ said Douglas loudly; Fabian grimaced and muttered to himself; ‘but I look at it this way. It’s my duty to give an honest opinion, and I wouldn’t be honest if I didn’t say that Aunt Floss liked to know about things. Not to mince matters, she was a very inquisitive woman, and what’s more she enjoyed showing people that she was in on everything.’

‘I know what you’re going to say next,’ said Ursula brightly, ‘and I disagree with every word of it.’

‘My dear girl, you’re talking through your hat. Look here, sir. When I got back from Greece and was marched out of the army and came here, I found Fabian doing a certain type of work. I needn’t be more explicit than that,’ said Douglas portentously and raised his eyebrows.

‘You’re superb, Douglas,’ said Fabian. ‘Of course you needn’t. Do remember that Mr Alleyn is the man who knows all.’

‘Be quiet, Losse,’ said Alleyn unexpectedly. Fabian opened his mouth and shut it again. ‘You’re a mosquito,’ Alleyn added mildly.

‘I really am sorry,’ said Fabian. ‘I know.’

‘Shall I go on?’ asked Douglas huffily.

‘Please do.’

‘Fabian told me about his work. He called it, for security reasons, the egg-beater. Fabian’s idea. I prefer simply the X Adjustment.’