Sandy, I checked and Old Dutton Cemetery in Marion Co is the correct cemetery. From whom of John P. Lyle and Elizabeth Noland do you descend? They had several children besides Lucinda Ann Lyle Harper.
John Thomas Harper and Mary E. Harper, both born during the Civil War were their only 2 children. They both had big families.
Mary E. Lyle married Mitchell Leith and they are buried in the Shiloh cemetery , Kansas, Walker co. AL.
There is a book about the Harpers " The Heartbreak of a Civil War Widow" that would be helpful with the Harpers.
A Doug Lyle had a post on one of the genealogy sites, I tried to contact him but his email address had been changed.