"Something Awful's Steve and Zack have an excruciating look at the artwork and rules from the original, 1974 version of Dungeons and Dragons, which appears to have been drawn by a hyperactive 12-year-old during an extremely boring math class. I remember seeing these not long after getting my first set of the AD&D hardcovers and thinking that they looked intriguing, if a little thin. I also produced an enormous amount of artwork that looked like this for the dungeons I created."
Original D&D art from 1974: our craptastic nerd origins - Boing Boing