The oldest version of the Stone Soup story that I've encountered is from 17th century France, which I always assumed to be the "original" version (if there ever is such a thing in folklore). Surprisingly, that same version, nearly 400 years old by now, is virtually identical to the one still found today in children's story books.

Oh, and the latest version I've encountered was the Disney version, "Button Soup" -- with Donald Duck's uncle as the old miser who keeps bringing out the soup's ingredients from hiding places in his mansion.

I liked the French version better.