Hello! I hope to receive a little help into the research of my 4th great-grandfather, Murrough O'Brien. He was born in the early 1800's and was married to Bridget O'Meara. The first information I have of him is on my 3rd great-grandmother's marriage record in Dublin, 1856. His daughter, Sarah, has also been difficult to locate birth information. Recently, I located a prison record in Dublin, 1868. He is listed as being from Tullow and this is the first I have been able to link him anywhere. I know that he was already living in Dublin as of 1840, around the year of birth for Sarah.
Any help would be GREATLY appreciated!