The DAR conducted a tombstone reading at Presbyterian Cemetery between 1934-5. It was published in Volume 69 of the Genealogical Records Committee Reports.
FamilySearch has microfilmed the volume and digitized it (DGS 7764385). An index of names are images 177-186 of 989. A note at the end of the index states that the names in the index were copied from the original record owned by the Grosvenor Library in Buffalo.
Since the 1910s, the Daughters of the American Revolution have been transcribing unpublished records to help preserve them. They then publish these as part of the Genealogical Record Committee (GRC) Reports.
One of the GRC Reports is a 208-page volume (#317 of the Cemetery, Church, and Town Record Reports) from the DAR Niagara Falls Chapter (of which I am a member) of records that were copied from the Niagara County Historian’s Office.
The report lists the name of the person that was buried, born, died, and the name of the cemetery.