I drew another tribute to Louis Wain, who specialized in drawing cats. He's best remembered for artsy ones he designed with wallpaper patterns. For decades it was speculated that he had schizophrenia, but I always thought the intense detail in his "wallpaper" drawings suggested some type of autistic disorder.
Sure enough, Many now believe he had Asperger's syndrome.
"...Louis Wain did not have schizophrenia but Asperger’s syndrome. It is very easy to confuse somebody with odd beliefs with schizophrenia and to think that these odd beliefs are formal thought disorder...
...There is little doubt that he was a very eccentric if brilliant artist. He was also interested in mathematics, insects, bird skins, perceptual motion, science, and mechanical objects...
...He was bullied in school as many people with Asperger’s syndrome are. He spoke with an unusual tone of voice. He had preservation of sameness. He was interested in music and was very obsessional. He was very naïve. He did go through a paranoid psychotic period just like Isaac Newton but the fundamental diagnosis was Asperger’s syndrome. "
-from the above link (scroll down to second article to see it).