Look for graves just outside the main enclosure. The remains of slaves, suicides, or people professing a different religion were sometimes buried outside the main graveyard. Look for evidence of mourning rituals. Search for supporting documentation. Find documents that can verify what you have found or give you more information.
Most cemeteries now have records of who is buried and where.
These might be found at the town clerk's or the graveyard office. Detailed information might be found in the register of deeds and probates, in church records, or in clerics' records. Private diaries and letters or family papers might yield information about private family plots. Town histories give information about people and times that can be linked to those buried. Make good notes or copies of what you find while you are on site .