I am not related, just enjoy research, especially in Oklahoma.
Marcillus Graham is buried in Stroud Cemetery, Lincoln Co. OK.There is also a Rosabell Graham, b. 6 March 1871, d. Nov. 12, 1913, whose stone design is a match for that of Marcillus Graham. There is an Edith Pearl Graham, buried in the same cemetery, whose stone is unreadable, except that the person who entered it did read Nov. 12.Could she and her mother have died the same day?
It might be that the stone for Rosabell Graham, which matches that of Marcillus Graham, was put in place several years later.
Here is a link to the Graham names found in the Stroud Cemetery.