Yes. Russell Martin “Beethoven’s Hair” (Bloomsbury)Besides being a good read – puts forward (and pretty much proves) the theory that Beethoven suffered from chronic lead poisoning, caused by drinking wine in lead cups.Here are the symptoms of chronic lead poisoning:Gastrointestinal distress, abdominal cramping, vomiting, constipation, diarrhea, gout , rheumatic complaints, jaundice, headaches, loss of appetite irritability, forgetfulness, erratic behaviour, clumsiness caused by the partial paralysis of the extensor muscles in the arms and legs visual deficits and progressive loss of hearingAll of which were exhibited by Beethoven.Best wishes,Bernhard.