Castlebar - Following the trail back to Ireland

Hello everyone. 

I am researching my Irish part of the family and my Great Grandparents, Michael Reilly (Born Abt 1851, Died Aft 1900) and his wife Mary Elwood Reilly (Born Abt 1855, Died Aft 1900) lived in Castlebar. He was a chimney sweep. His parents were John Reilly (Born abt 1802, Died 27th July 1878 in Moyres), and his mother Mary Joyce Reilly, (Born abt 1836, Died abt Jun 1915). 

I know it's a long shot but if anyone who is doing their tree, who may come across them in their search, I'd love to hear from you.

Thanks Ian Johnstone email osricks01@outlook.com