Here is another reference for burial practices in the New
England and Middle Atlantic:
David
C. Bachman and Wade P. Catts
Final Archaeological Investigtations of the Lafferty Lane Cemetery...
Delaware Department of Transportation Archaeological Series
Number 80, 1990
This report contains a number of interesting items about burial
practices in Delaware, where there were some peculiarities, such as
a shunning of grave markers even by high-status non-quaker families.
There is also a model for cemetery location.