I haven't read many of the novels about wizards yet and would like to know who they are.
[Image by Paul Kidby]
The Discworld & Terry Pratchett Wiki has the full and, I believe, original image of the one in your question on the page Unseen University. It is captioned thusly:
Left to right: The Lecturer in Recent Runes, The Dean, The Librarian, The Archchancellor, The Senior Wrangler, The Bursar, Ponder Stibbons, The Chair of Indefinite Studies and Rincew.... oh he's, er, gone.
Adding annotations, we have:
Rincewind is not in the image but is noted in the caption for it.
Gentlemen, PLEASE! (And ladies, and mon...apes - decidedly apes). This is an institution of HIGHER LEARNING! Let us be careful to use the Full and Correct Names and Titles of our colleagues AT ALL TIMES! Ahem...
#1 is The Chair Of Indefinite Studies. Not sure about the name - CHAIR!!!! WHAT'S YOUR NAME?!?!?! Oh, for heaven's sake, can't understand a word he says, always walking round with a biscuit in his mouth like that. HOLD THAT THOUGHT, CHAIR!!!
#2 - the Dean of Pentacles, dear old Henry...errr...what's-his-name. (Brilliant man, to be sure, but...well, I'm not sure I'm completely convinced of his dedication to dear old UU. But still, where's the man to go..?)
#3 - the Librarian, dear old...what? Don't say..? Oh, yes, I'd quite forgotten. Just "Librarian". And the M-word..? Don't use that either? (Given all these restrictions on perfectly normal forms of speech I rather wonder if he's worth all the troub...) Now, now, Librarian, just put me down - GENTLY! - and we'll say no more about it. Heh...
#4 is, of course, myself, Mustrum Ridcully, DThau, DM, BS, DMn, DG, DD, DMPhil, DMS, DCM, DW & BElL, currently Archchancellor of Unseen University, for the forseeable future, and I've foreseen a good bit of the future, let me tell you!
#5 is The Lecturer In Recent Runes (as opposed, of course, to the Lecturer In Ancient Runes). Not sure about his name, precisely, although rumor has it that it is definitely not Arnold.
#6 is, undoubtedly, Dr. A. A. Dinwiddie (spelled with an "O"), D.M.(7th), D.Thau., B.Occ., M.Coll., B.F., titled The Bursar. Isn't that right, Bursar? Bursar?? BURSAR?!?!?!?!? Oh, bother. Well, give him another frog pill, someone, and we'll attend to him shortly...
#7 is of course young Stibbons, the Head of Inadvisably Applied Magic, Praelector, the Master of the Traditions, the Reader in Invisible Writings, and the Camerlengo (although why this should be is a question I intended to leave open for the foreseeable future). And also Head of any other odd job I find lying about that no one seems to know how to do, or why, or when. Well, someone must..!
#8 - the Senior Wrangler, which is rather odd because we don't actually use horses around UU. Eh? What? Mathematics?!? We NEVER use that around here!!!
And while we're on the subject - we should take a moment to acknowledge the contributions of our colleagues who are not actually present at the moment, such as they are. And they are:
And of course, Professor Rincewind, who is:
so if both I and Stibbons were to pop off you'd get Rincewind as Archchancellor, so let that be a warning to you!
And #9 is...amazing! I didn't know there were any more of those things left alive! Rare, that is - deucedly rare! SOMEONE FETCH MY CROSSBOW!!
This image is from the book "The Pratchett Portfolio" (ISBN: 0-575-06348-3).
According to the accompanying text:
Pictured opposite: Caught in uncharacteristically non-eating mode by the iconograph, the current incumbents of magic's highest offices are, left to right:
The Lecturer in Recent Runes, the Dean, the Librarian, Mustrum Ridcully the Archchancellor, the Senior Wrangler, the Bursar, Ponder Stibbons (Reader in Invisible Writings) and the Chair of Indefinite Studies.
There isn't any reference in the book to the flying creature.