Hi Alison, Thank you for your help.
I don't know anything about Annie's father Robert Barton except that he does not appear to have been born in SA or to have died here.
I wasn't aware of Henry Bridgman b. 9Feb1877. I think he was probably a son born to my g-grandmother, Leah Bridgman when she was 18y and before she married my g-grandfather, Richard Thomas. Genealogy research turns up all sorts of interesting things doesn't it.
Again, thank you,
John