Thanks for that. How interesting.
Yes, looking at the census info, there was also a sister Kate Wylie, born in 1872 (and maybe also Mary Jane born in 1867 and Mazie in 1868).
I was sad to see about Amy J Brown/Wylie: she went to Liverpool to be married to Alexander B Wylie in 1911 and died in 1912. Particularly sad if Alexander was away. She was only 22 and her death was registered by M Hampton, sister-in-law (your grandmother?).
You don't happen to know how the family is connected with the Browns of L'derry, do you? As we've said, John Wylie was boarding with them in 1911.
Also a David Wylie was a witness at the wedding of Amy J Brown/Wylie's father, Robert Hamilton Brown to Harriet Lobb in 1899. Who was he?
I have found out that Agnes Brown nee Stewart, Amy J Brown/Wylie's grandmother, (married to the Alexander Brown, Ironmoulder who I am researching) was related to Wylies in Scotland: her grandmother was a Mary Wylie, born 1762 in Kilmarnock, Ayrshire.
Thanks again.