Wittgenstein and pictures

The philosopher Ray Monk has this article about Wittgenstein and his preference for pictures (as opposed to words). There is an exhibit at the London School of Economics with the theme of pictures and Wittgenstein. While I seem to have some disagreements with Monk about his interpretation of the Tractatus (but who am I to disagree with Monk?) and about his view that philosophers don't draw a distinction between propositions, thoughts and language (they do and some would assert that even pictures have propositional content), I am reminded by his article of Jaakko Hintikka's claim long ago that Wittgenstein's notorious struggles with language, his related dogged focus on illuminating the mysteries thereof and his preference for pictorial representation (which is a sensibility he kept throughout his life) was a result of dyslexia.