A now deceased wizard who once resided at Unseen University. Wally Sluvver was one of those unfortunate wizards who actually had to teach classes there. In fact, he taught three years of tutorials post-mortem with no one noticing. The students merely remarked that he was a "bit quiet".
The Chair of Indefinite Studies mentions him in The Last Continent when the Faculty discover that the Egregious Professor of Cruel and Unusual Geography's room is filled with old paperwork. The wizards suspected that the Egregious Professor had suffered a similar fate. They were right, although his death happened on a tropical island thirty thousand years ago.