That's interesting...Thomas Brown is my great-grandfather too! My grandmother is Thomas's daughter Bertha Louise who married John O'Gay. They had one son, Harry, who is my father.
Which of Thomas's 15 children is your grandparent?
About our great, great grandfather, Robert, I said he died in 1875 but it was really 1874. I have been to the graveyeard in New Harbour where he is buried.