A fellow researcher of the Baldwin Family, who I have corresponded with on a number of occassions picked up on this thread and sent me an image of Samuel Baldwins Grave Stone, which indicates that Samuel died 3 Dec 1887, was buried in Holy Trinity Church, Drybrook 7 December 1887. On the same gravestone are the deaths of his children :
George 1 & half years
Cornelius 10 years
William 25 years
and importantly here Sarah Ann 37 years.

So, Sarah Ann was living back with her family in 1881 according to the census. I would surmise that after a parting of the ways, Cornelius Brain then started living with Maria Hatton, he was living as a boarder in 1881. First child with Maria 1879. Sarah Ann dies aged 37 in 1886 and Cornelius marries Maria Hatton in 1888.

It's almost like being there !!

Jim Ashton