Hello
I am also researching this family tree.
In the 1856 marriage cert for Jane she gives her name as Jane Devine. Her father is given as

Devine a farm labourer and then Mary Lamie.
Kilsyth - you have Jane born in 1828 any parish in Tyrone and if there is an entry for her birth does it give William Ferguson and Mary as her parents?
I am confused . if they are her parents why is she called Devine etc on the marriage certificate?
John Brown is on the 1871 census at EAND g Turnpike road in Lanarkshire, Bothwell. Jane is dead by then. he is aged 60 . I havent found his death certificate yet.
Nan