I am looking for the burial location of Mary Ann Frances Tichenor Barker.

Mary Ann’s husband was Thurston Gardner Barker and he is buried in East Hill Cemetery, Jefferson Township, Hillsdale, MI per Family Search.
Thurston Gardner Barker 13 Jun 1817 - ?? 1883 – East Hill Cemetery
Mary Ann Frances Tichenor Barker 18 Jan 1818 – 14 Jul 1865 = dates based on son Henry’s info – they were living in Jefferson at the time.