Thanks everyone for the time and care you've put into this. I think Gem and Jean are probably right. When I rewrite my piece on 'Blind Robert' I will add the recent Miles findings. Obviously he had to have a Dad...so may as well be Miles/Mills. In 1861 Census he is Robert K Mills. K for Kelly I assume.
This winter I'll be digging in Patrick again to find out more about his grandfather who died 1860...yet another Robert Kelly !!