Havelock Vetinari, Patrician of Ankh-Morpork. Art from “The last Hero” novel.

A young postman sketch. 

Mr. Tiddles, from “Going Postal” 

Mr. Fusspot, from “Making Money”.

‘Neither rain nor snow nor glo m of ni t can stay these mes engers abo t their duty’
Don’t arsk us about:
Rocks
Troll’s with sticks
All sorts of dragons
Mrs Cake
Huje green things with teeth
Any kinds of black dogs with orange eyebrows
Rains of spaniel’s
Fog
Mrs Cake

“Ankh-Morpork! Pearl of cities! This is not a completely accurate description, of course — it was not round and shiny — but even its worst enemies would agree that if you had to liken Ankh-Morpork to anything, then it might as well be a piece of rubbish covered with the diseased secretions of a dying mollusc.” 

Leonard of Quirm, Carrot and Rincewind wearing space suit, from “The Last Hero” book.