Thanks Aghadowey.
I think your info re Lisburn Cemetery is most probably correct - as I have their birth dates as 1870 and 1873.
Interestingly, in the 1911 Census, Arthur was declared as a boarder in 32 Pandora Street. He married Maria McAuley that same year and they then moved into no 34.
You are obviously an expert at genealogy so could you please answer a question. Why am I unable to find any record of a death certificate, even when entering the dates that you gave me.
Also, you have named sites I have never remotely heard of, but which are superb sources of information. Is there any 'list' available that can give us less experts a wee help?