Maybe some people know this illustration from Realms of Power: Magic, page 40:
... I just stumbled upon it again, and started wondering: "Wait, I know that picture..."
... it's a picture I actually used for a grog in one of our sagas. 
It's funny (and interesting) when you stumble upon a picture that an illustrator has used as reference, but even more so if you actually used the same picture for the very same purpose (in this case: depicting an Ars Magica character). 