This cemetery is next to the Cobblehurst house which was once the meeting place for the Friends. The Niagara County Historian’s Office (139 Niagara St., Lockport) has a folder for the Orthodox Friends Cemetery in Hartland (folder 25-04-0042.01). Within the folder contains a handwritten list that was likely a tombstone reading that is notated that it was donated 4 June 1979 (indicating that the reading was done prior to that).

Included in this folder was also a list of veterans marked with GAR markers:

There is also this 1980 typed list compiled by the Town Historian at the time, Florence Arnold. This identical list is available on FamilySearch: https://www.familysearch.org/ark:/61903/3:1:3Q9M-CS4L-D7RY-N

There was also this note about the cemetery:

The pictures above are shared with permission pending credit given to the Niagara County Historian’s Office. Learn more about the Niagara County Historian’s Office at:
https://www.niagaracounty.com/Departments/Historian