Carolyn, There is a Luke Gilbert buried in Mine La Motte Cem., Madison County, MO Abernathy, Luke Gilbert Jan. 30, 1885-Jul. 20, 1942 Abernathy, Martha E. Jan. 28, 1891-Nov. 24, 1930 w/o Luke Gilbert Abernathy.
Luke could have possibly married Sarah Mungle after the death of Martha Burcham Abernathy. I will look to see what I have if you are still interested. Deena