I'm trying to find my Grgrandparentsmarriage details and any other relatives in USA. Have discovered that Annie McKee and Henry Burnett married in Pittsburg, Pennsylvania in Jan. 1866. Annie was born in Co. Londonderry, Ireland in the 1830s, would like to find when she went to America. Also, where in Pittsburg would I write to for the marriage certificate? They both came to New Zealand and settled here.Kathleen.