sorry that did'nt help,putting a stake in sounds gruesome to say the least.
the cemetary I am most familiar with is mount jerome in dublin,my maternal great grandmother was buried there in 1930 in a common grave,mount jerome is now owned by masseys undertakers,when I asked for information on this grave I was told there would be other non family members buried with her but they were able to supply a map of the cemetary with a number for this grave highlighted on it plus date of death name age and informant.although there is no stone there is a number etched into a piece of metal at the head of the grave.good luck with your search.
regards.Anne