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I searched on the subscription site Roots Ireland and found an 1860 marriage for Bernard and Sarah in the Mohill Church of Ireland church. The name of Bernard's father was shown (Patrick) but not the father of Sarah. See below. I was unable to locate the baptismal records for Bernard and Sarah. Did they emigrate or stay in Ireland?
Date of Marriage:14-Jan-1860
Parish / District:MOHILL CHURCH OF IRELAND
Husband BernardDonnelly Address Mohill
Husband's Father PatrickDonnelly