Pleasant Brown married Margaret Peggy Whitson the daughter of William Whitson and Margaret Plumlee. Santford H Plumlee and Margaret (Plumlee) Whitson must have been cousins, he could have been visiting the family. Did the census takers list everone in the home at the time they come by to list for the census or do they only list those who live in the home? I don't know why Cynthia is listed with the Dunken family. Hope this is helpful.