There is a question of whether Devilla and her husband William T. Barclay are buried in Hart-Mill Cemetery or in the Magnolia Cemetery in Woodville. The 2006 photos I took of their headstone was definitely in the Hart-Mill Cemetery. Another posting was made to the Tyler County Genealogy website that a researcher took in 2008 at Hart-Mill Cemetery. She also lists their burial as being there.
If there is a headstone in the Magnolia Cemetery as well as the Hart-Mill Cemetery, for this same couple, the only conclusion I can come to is that one or the other was put there as a memorial because of immediate family buried in the cemetery.
I would prefer to leave this memorial on the Hart-Mill Cemetery FindAGrave listing at this point in time since that is where I took the photo and posted the entry to FindAGrave.