RAFFERTY WAITED UNTIL his sergeant was seated comfortably before he began. 'We assumed that Moon had an affair with Carstairs. What if we were wrong? And it was Mrs Carstairs with whom he had the affair, and Sarah Astell was the result? Mrs Astell told us her arrival caused a bit of a stir as she wasn't born till her parents had been married for ten years.'
Llewellyn, of course, was inclined to pour cold water on his idea. 'It's something of a wild leap, isn't it?' he criticised, obviously more than content with his own theories and unwilling to have Rafferty throw cold water on them. 'Have you any proof to back it up?'
'Not proof as such,' Rafferty admitted. 'Not yet. But I've got the next best thing. I did a bit of arithmetic, and, for once, my sums added up. Was it just coincidence, d
