Soul Music - Vanish

'It's so simple! It strolls into traps! It changes people! They want to play m- I've got to go,' said Susan hurriedly. ' Er. Thank you for the porridge . . .'

'You haven't eaten any of it,' Ridcully pointed out mildly.

'No, but . . . but I had a really good look at it.'

She vanished. After a little while Ridcully leaned forward and waved his hand vaguely in the space where she had been sitting, just in case. Then he reached into his robe and pulled out the poster about the Free Festival.

***

Soul Music - p173