Murphy Family of Kilkeel, Down

Looking for information about Hugh Murphy who was born in Kilkeel, Down between 1800-1810, married Catharine Quinn(1810-1884), emigrated to the United States and settled in Vermont, USA before 1832.  He had two sons and two daughters with Catharine Quinn.  Hugh Murphy was murdered by William Quinn in Fairfield, Chittenden, Vermont in 1841.  Looking for the birthdate of Hugh Murphy, the names of his parents and the date and place of his marriage to Catherine Quinn of Kilkeel, Down. Any information would be greatly appreciated.