Robert F. "Bo" Brown (1906-1996) was a law student at the University of Pennsylvania in 1930 when he sold two cartoons to the Saturday Evening Post.  The income he received from this sale was impressive when compared to what he could make as a fledgling lawyer, so he decided to take a leave of absence from Penn Law and try his hand at full-time cartooning.  66 years and 33,000 published cartoons later, he was still on leave, and met his last deadline two weeks before his deat (showing 500 of 1077 characters).