Vicki’s note – article from Family Tree Magazine Plus:
Now What: Do Backwards Gravestones Indicate Suicide?
A. Cemeteries follow different traditions, but if a person who committed suicide were to be ostracized after death, it’s more likely that the body would be buried apart from others. According to the Association for Gravestone Studies, the north side of a cemetery was often considered less desirable, so suicides might be buried there along with paupers, slaves, members of minority religious sects and the unidentified deceased. Suicides also were sometimes buried upside-down, with the head vertically below the feet, as a post-mortem punishment; this required considerably deeper digging and, of course, is impossible to check without excavation.
Rather than a suicide, you might find that someone buried the opposite way is actually a minister. Many church graveyards were laid out east-west, with the head at the western end of the grave, to be facing the risen Christ on Judgment Day. But the minister was sometimes buried with his head at the eastern end of his grave so he’d be facing his flock at the time of Resurrection.