I too am a decendant of those fine people. the story that we have been told is that Lydia got sick and went to live with her parents for a while. Luke didn't think that she was that sick and she died before he could see her again. Daniel and Mary Cook lived in Nephi and that is where Lydia was buried. Her grave marker has long since disapeared and the city doesn't have records that survived from that time. SHe is buried in that cemetary but no one is alive who could tell us where.