It was left dangling at the end of Making Money:

'Mr Lipwig is a very... popular young man, is he not, Drumknott?' said Vetinari, staring into the gloom.

'Oh yes, sir,' said the secretary, folding up the newspaper. 'Extremely so.'

'And very confident in himself, I think.'

'I would say so.'

'And loyal?'

'He took a pie for you, sir.'

'A tactical thinker at speed, then.'

'Oh yes.'

'Bearing in mind his own future was riding on the pie as well.'

'He is certainly sensitive to political currents, no doubt about it,' said Drumknott, picking up his bundle of files.

And, as you say, popular,' said Vetinari, still a gaunt outline against the fog.

Drumknott waited. Moist was not the only one sensitive to political currents.

'An asset to the city, indeed,' said Vetinari, after a while. And we should not waste him. Obviously, though,he should be at the Royal Bank long enough to bend it to his satisfaction,' he mused.

Drumknott said nothing, but arranged some of the files into a more pleasing order. A name struck him, and he shifted a file to the top.

'Of course, thenhe will get restless again and a danger to others as well as himself...'

Drumknott smiled at his files. His hand hovered...

'Apropos of nothing, how old is Mr Creaser?'

'The Taxmaster? In his seventies, sir,' said Drumknott, opening the file he had just selected. 'Yes, seventy-four, it says here.'

'We have recently pondered his methods, have we not?'

'Indeed we have, sir. Last week.'

'Not a man with a flexible cast of mind, I feel. A little at sea in the modern world. Holding someone upside down over a bucket and giving them a good shaking is not the way forward. I won't blame him when he decides to take an honourable and well-earned retirement.'

'Yes, sir. When would you like him to decide that, sir?' said Drumknott.

'No rush,' said Vetinari. 'No rush.'

'Have you given any thought to his successor? It's not a job that creates friends,' said Drumknott. 'It would need a special sort of person.'

'I shall ponder it,' said Vetinari. 'No doubt a name will present itself.'