[math-fun] Math history questions: infinite decimals

It's well known that Simon Stevin came up with the concept of decimal representation. But did he consider infinite decimals? Who first asserted that 1/3 could be written as .333... (and come to think of it, who came up with "point three bar")? Who first considered decimal expansions of irrational numbers? And who first thought about .999...? Thanks, Jim Propp