I found the marriage of Edward Sweeney and Barbara Walsh and 2 christenings:
Marriage of Edw and Barbara:June 15 1845, of Ballysakerry Witnesses were Michael S and Maria Sweeney
1848, Belinda, of Smithtown No witnesses noted
Nov 28 1868 Thomas William, of Killala district, no witnesses noted
I also have a death of an Edward Sweeney:
November 6 1932, of Cloonfadda, Ballysakerry
This info was obtained by another researcher, not myself. You should check catholic registers in the Northern Mayo area, particularly Ballysakerry parish.
Hope this is what you were looking for!
Diski