Thanks all! Ross, I have printed off your article!
Pieter, Ulrichs wrote to quite a number of leading forensic psychiatrists of his day and ended up having a correspondence with Krafft-Ebing over several decades (though we only know of that because Krafft-Ebing refers to it in a letter and is quoted by Ulrichs). He was a bit of a monomaniac though may have tried to involve others. By "other then gay activists" I presume you mean Kertbeny? Or did you mean people other THAN gay activists? I'd be interested though in your chapter.