Wow, that's very sad news. I don't know how old he was (I'm guessing early to mid 60's?) but obviously must have been suffering for several years already with the dementia. Seems likely that there will be a link to heading the ball as he was a defender. He was a constant in the City side from the late 70's - early 80's, just at the time I moved back to Wales and I was able to attend home games regularly, so I remember him well.