Sometimes I wonder how many unfinished (or should I say unpublished) works the greats like Mozart, van Gogh, Steinbeck, etc. had. Surely they didn't all produce

Sometimes I wonder how many unfinished (or should I say unpublished) works the greats like Mozart, van Gogh, Steinbeck, etc. had. Surely they didn't all produce masterpieces from the get go.