I need some help and advice in finding a clergymen named William McLaughlin who married my GGreat Grandfather Cornelius O'Callaghan (variations Callaghan/Callahan) and an Elizabeth Kennedy in Londonderry 1856. The Birth Certificate was a military document and does not provide the church location or denomination or any other family details. The information should provide a location to research and the Kennedy Family in Northern Ireland. Richard Isaac - Brisbane