I now have a copy of the the Marriage Certificate for Anthony CUSICK and Margaret Dunn.
However he was born as a CUSACK and died as a CUSACK according to his Death Certificate.
On the Death certificate (Registered Cathcart, Glasgow 1959) Anthony was a Builders Labourer retired (Married to Margarett Dunn) Address 3 Bankhall St. Glasgow.
Anthony's mother's maiden name was Ann Mugan (deceased)
Father: John Cusack, Shoemaker (deceased)
Informant: John Cusack, son. (I have his address if anybody thinks they are from the same family, then please pm me)
A copy of the Death Certificate was also issued to my Uncle James Cusack (son)who lived in Hampstead, London at the time.
I have found James and my Aunty Sheila living at this address too, on the Scotland Electoral Registers, before they moved down to London.
From the spreadsheet my Cousin also sent, all of Anthony's 8 children, (except for James the first born) had the Surname Cusick rather than Cusack, just to complicate matters!
Anthony Cusack Was born 11 July 1879 at Sraheen, (I cant' make out the District, possibly Isla??eady) in the Union of Westport, Co. Mayo, mother Anne Mugan. Father John Cusack.
One of my cousin's uncles emigrated to Canada. Ring any bells with anyone?