Before there was Facebook, there was doodling. Note to profs, students never payed attention in class. Kyle Graham went through Chief Justice Rehnquist’s law school notebooks, and found plenty of doodling in the margins:

 It also appears that Rehnquist liked to doodle, and in particular, that he enjoyed drawing portraits of now-obscure individuals in the margins of his notebooks. So, here’s a word of advice to you kids out there: Don’t pay attention in class, and you eventually will become Chief Justice of the United States Supreme Court.