I am new to the list. I thought I would post the scanty information I currently have. Peter Davidson, b. abt. 1834; Ballymurphy, Greyabbey Parish, Co. Down, IRE. married Agnes Walker b. abt. 1839; Ballyboghilbo; dau. of Joseph Walker. Marriage was performed in the Greyabbey Presbyterian Church on 21 JUNE 1859. Aprox. 1881 the immigrated to Irwin, Shelby, IA. Thank you, Sandra