[1] The cemetery is approximately 35 acres in size and was designed by Francis Peabody and Alexander Wadsworth.
An old burial ground, called Gardner Hill, was situated a little west of Harmony Grove.
[4] When the area of Boston Street and Grove was developed in the 1840s, one hundred fifty gravestones were moved from Gardner Hill to the cemetery.
The stones of Thomas' daughter, Seeth, and grandson, Abel, were also moved to Harmony Grove.
[5] One of the stones moved from the old burial ground was for Robert Buffum who arrived in 1634, from Yoshire, England, and was buried in 1669.