I didn't find his burial in the Loudoun County Cemetery Database, www.lessburgva.gov/government/departments/thomas-balch-libra...
. Also the Smallwood Cemetery wasn't listed in their list of all the cemeteries in the county.
I'd contact the Loudoun Preservation Society, www.preserveloudoun.org/
and ask if they have a list of all the cemeteries or who would have this list. Successful Searching!