Vimes struggled to his feet, shook his head and set off after it. No thought was involved. It is the ancient instinct of terriers and policemen to chase anything that runs away.

Mr. Tulip lived his life on that thin line most people occupy just before they haul off and hit someone repeatedly with a wrench.

The short conversation that follows eventually led to a tree religion. Its tenet of faith was this: a tree that was a good tree and led a clean decent and upstanding life could be assured of a future life after death. If it was very good indeed it would eventually be reincarnated as five thousand rolls of lavatory paper.

Who knows what the future holds.

She was not, herself, hugely in favour of motherhood in general. Obviously it was necessary, but it wasn't exactly difficult. Even cats managed it. But women acted as if they'd been given a medal that entitled them to boss people around. It was as if, just because they'd got the label which said "mother," everyone else got a tiny part of the label that said "child".

Probably the last man who knew how it worked had been tortured to death years before. Or as soon as it was installed. Killing the creator was a traditional method of patent-protection.

Any sensible ruler would have killed off Leonard, and Lord Vetinari was extremely sensible and often wondered why he had not done so. He'd decided that it was because, imprisoned in the priceless, inquiring amber of Leonard's massive mind, underneath that bright investigative genius was a kind of willful innocence that might in lesser men be called stupidity. It was the seat and soul of that force which, down the millennia, had caused mankind to stick its fingers in the electric light socket of the Universe and play with the switch to see what happened - and then be very surprised when it did.