Addendum:
One additional small burial site was located in the woods in the autumn of 2009. There were numerous stone fragments scattered in the area, but only a few stones with readable markings. They are as follows (the slashes indicate a new line):
HOFFMAN JOHN HOFFMAN/ DIED/ MAY (possibly 11), 1868/ IN HIS 36 YEAR Footstone: J H
GRAHAM MATILDA/ DAUGHTER OF/ J & M GRAHAM/ DIED/ DEC. 21, 1810/ AGED 1Y 6M 7D Footstone: MG
??? AGED 56 YRS/ & 21 DS.
??? _____ THOU MUST WITHOUT/ TO SMILE AS THE SUMMER _____/ PLEASANT IS THE AIR OF _____/ PROUD BE THY SILENT SLUMBER/ PEACEFUL IN THE GRAVE SO LOW/ THOSE NOW WILL JOIN OUR NUMBERS/ THOUGH MORE OUR SOULS SHALL LIVE/ BROTHER THOU HAST _____/ NOW THY LOSS WE DEEPLY FEEL/ BUT IS GOD THAT HATH BORNE US/ WHEN STILL OUR SORROWS HEAL./ AGAIN GO HOME TO MEET THEE/ THEN IN HEAVEN WITH JOY TO MEET/ WHEN THE DAY OF LIFE IS FLED/ WHERE NO FAREWELL IS HEARD
HOFFMAN JOHN HOFFMAN/ DIED/ MAY (possibly 11), 1868/ IN HIS 36 YEAR Footstone: J H
GRAHAM MATILDA/ DAUGHTER OF/ J & M GRAHAM/ DIED/ DEC. 21, 1810/ AGED 1Y 6M 7D Footstone: MG
??? AGED 56 YRS/ & 21 DS.
??? _____ THOU MUST WITHOUT/ TO SMILE AS THE SUMMER _____/ PLEASANT IS THE AIR OF _____/ PROUD BE THY SILENT SLUMBER/ PEACEFUL IN THE GRAVE SO LOW/ THOSE NOW WILL JOIN OUR NUMBERS/ THOUGH MORE OUR SOULS SHALL LIVE/ BROTHER THOU HAST _____/ NOW THY LOSS WE DEEPLY FEEL/ BUT IS GOD THAT HATH BORNE US/ WHEN STILL OUR SORROWS HEAL./ AGAIN GO HOME TO MEET THEE/ THEN IN HEAVEN WITH JOY TO MEET/ WHEN THE DAY OF LIFE IS FLED/ WHERE NO FAREWELL IS HEARD