I've tracked my family back to when they entered the united states around the 1850's in Philadelphia, pa. I have had no luck going back further . I have a Mary Dunn who married a Horan and immigrated with her sons, Edward b. 1824, James 1835, Thomas 1836. All dates are from either cemetery records or city death records. I believe she had a brother Patrick born 1789 in Ireland, died 1864 also in Philadelphia. help would be greatly appreciated.