@Fine sad! hadnt heard that. unf that presumably decent article is behind a paywall, argh. but have heard many stories like that. recently it was grothendieck.
vzn1.wordpress.com/2014/11/26/… and there are a few logicians who deteriorated at the end of their lives also. (iirc fortnow blogged about it once.) overall it might make an interesting book topic. unf its considered something like "dirty laundry" by scientists. macabre? :|