Or so people keep saying, which is a bit unfortunate, because ever since the success of the Harry Potter books, Terry is hearing increasingly more often from people who ask if (or sometimes even demand he acknowledge that) he ‘got’ Unseen University from Hogwarts, etcetera, etcetera.
In this case, the first drawing of Ponder Stibbons (looking exactly as he does here) appeared in the 1996 Discworld Portfolio, whereas the first Harry Potter novel was not published until 1997…
Terry says:
“Ponder Stibbons was indeed first drawn in 1996. I, of course, used a time machine to ‘get the idea’ of Unseen University from Hogwarts; I don’t know what Paul used in this case. Obviously he must have used something."