I am trying to trace my Great Grandparents. Thomas O'Grady born 1841 in limerick. He married a girl named Catherine (Kate) also from limerick. she was born 1842.They had two sons Michael (b.1861) and Patrick (b 1869) before emmigrating to England. I know only of them from the 1881 UK census showing that they lived in London at that time. I can find nothing from Irish records. any assistance would be appreciated.