Some additional details on the cemetery can be found at:
http://www.interment.net/data/us/pa/montgomery/henderson/henderson.htm,
which is where the following excerpt is taken from...
I have walked this cemetery and transcribed existing
tombstones or markers on Jan 26, 2002. It is incomplete in that,
there is evidence of more burials, plus some stones
broken/unreadable.
This cemetery is abandoned, the official name unknown, so I
named it after the Road it is on.
- Jennifer Maurer
A third of those interred here bore the name Henderson, although
based on the above, this may not be where it acquired its
unofficial name.
You will need to obtain some dates from one of the markers in
the cemetery to get the actual coordinates for the cache.
Look for the largest, most prominent marker in the cemetery,
placed by children for their parents. You will need to record the
birth and death dates of both Mother and Father.
Actual cache coordinates are:
N 40 0A.BCD
A, B, C and D being based on dates for the Father,
and calculated as follows:
A = Day the Father was born
B = (Month the Father was born - Month the Father died)
C/D = Age of Father when he died (two
digits)
W 075 EF.GHI
E, F, G, H and I, being based on dates for the Mother
and calculated as follows:
E/F = (Age of Mother when she died / 3) (two
digits)
G = (Month the Mother was born / 4)
H/I = (Day the Mother was born + Day the Mother died) (two
digits)
As always, please be respectful of the location act
accordingly.
The cache container has room for small tradeables, trackables
and coins.
(Southern chapter!)