Hi.
Margaret Curran is/was my 3C1XR. Her mother was Catherine Stevenson, whose father was Joseph Stevenson, my GGG-GF. Her father was Patrick Curran, his father was Charles Curran.
I have some details on that side of the tree, if youre interested..
I dont know much about James Black, sorry, other than his father was James Black too!
Cheers...