Wizards need to study, study long and hard to acquire the knowledge necessary to bend mystic powers to their will... and in most game systems, it's a continual process, something that must be done every day to ensure that you have your powers at your fingertips when you need them. So it's nice to have a picture of a wizard with his nose in a book - as you can be sure that your wizard character is often found in that position!
It is a clear and crisp rendition in ink and wash, standing at a lecturn leafing through a heavy tome, with hand-illustrated pages. Behind him, a landscape view through the window isn't proving too much of a distraction. Middle-aged, I reckon, and probably human (unless elf ears in your world are more discreet than many illustrations suggest).
If you are buying this for more than an illustration for your character sheet, the licence is beautifully straightforward and concise, none of the convoluted legalese some folks like to use. Do as you please, but give the artist due credit, and don't sell it on as pure clipart.
I really like him, even if he won't do for my current wizard... my Calatin is, shall we put it kindly, of the cuddly persuasion. This guy's more in the heroic mould, perhaps even missing his dinner for a couple more hours with his books.