Thanks to FindAGrave volunteer, Natalie Herdman, I now have a photograph of the tombstone of Phillip D. LeMASTERS (1869-1869), the infant son of Luman Walker and Mary Keziah (CHEW) LeMASTERS. Phillip is buried in the Webster Cemetery in Darke County, Ohio.
My database shows his dates of birth and death are January 28, 1869 and May 1, 1869. However, the memorial states death date November 5, 1869. Hard to read, but they may be correct.