I wish I could have found more information about this local family, but since I couldn't, just take a look at the names and dates of the various markers in this family plot, and you can almost picture the lives of these family members through the years.
The listed coords above will lead you to the family plot, where you will gather clues to derive the coords for the second and final stage. Take your time to work the clues carefully. The final stage is a log-only capsule cache container that I've hidden at a nearby park in an area of it where you should be able to search discreetly...but still, be aware of who might be around you watching your activities.
Coords for final stage:
N30 AB.CDE
W88 FG.HJK
A = 4th digit of the year of Henry Delancey's death
B = 3rd digit of the year of Ellen Delancey's death
C = 3rd digit of the year of Richmond Delancey's death
D = 4th digit of the year of Docia Delancey's birth
E = 4th digit of the year of James Delancey's birth
F = 3rd digit of the year of William Delancey's death
G = 3rd digit of the year of John Delancey's birth
H = 4th digit of the year of birth of the infant son born on October 7th
J = 4th digit of the year of birth of the infant daughter born on February 9th
K = 2nd digit of the number of James Delancey's WW I Depot Brigade
*** IMPORTANT NOTE: If possible, please replace the cache log sheet in the *lid* portion of the capsule and then replace the *base* portion over the log, to make it easier for future finders to access the log sheet (even if a finder before you replaced it in the *base* and made it tough for you to get the log sheet out...please help...thanks!).