Thank you all for the suggestions on info. It sure is amazing the variations you find with peoples' surnames.
The husband's name was Henry McKensie Shaw. There were married on November 3rd 1885. I wasn't sure if posting a link to the PDF file was against the rules or not so played it safe.
On PRONI's website they actually have the name recorded as Dumgin but I think that's way off the mark.
My main reason for clarifying it is I'm trying to find the birth record for their son Samuel Shaw. However it's very possible he was born out of wedlock because all the indicators I have so far for him have him born 1882/3. The 1901 Census only lists him aged 18 so he's likely an only child. (at least surviving)
Mary was born around 1855 in Co. Down, Ireland.
I'll try some of the suggestions and see what I can find
