I found this gem on the internet yesterday for Houghton County, Michigan: Marriages: 3 Apr 1869 at Schoolcraft - TREWICK, JOHN of Schoolcraft, 22, born England, miner and MARY TREWICK nee MARY STONE of Schoolcraft, 25, born England. Witnesses - JAMES and ELIZA STONE This is the piece I needed to be (almost) convinced that Mary is my great- grandfather's sister. Does ANYONE know ANYTHING about Mary Stone of Houghton?