Our church cemetery has people buried in it since 1840. Lots of people have no grave markers, just rocks placed at head and foot of grave. I have went to the church library and read through the minutes and indexed all the people mentioned that died back from 1840 to 1940's. My husband and I also indexed all the cemetery head stones and made a map/plat of the graves there. I then compared the list of names in the minutes with the list of names on the grave markers. and listed the names from the minutes with the index of the cemetery indicating that they only appeared in minutes and had no grave marker. I contacted family descendants of the names and some knew where their family member was buried. Some that did not have family local, were identified and we place a small marker for that person. For instance, I have kept obituaries of the people buried in the cemetery since 1970, if the family have all died or we have no way of finding them, My husband and I placed a small marker with the name, birth year, and death year on the marker to make a record and also to mark an unmarked grave. It has all been a labor of love. I siad all that to say this. The church minutes has much information, for instance, when they joined the church, or moved their letter, and sometimes when they died. So old church minutes are a wealth of information. when all else fails.