In the 1790 and 1800 US census, John Wheelwright was the Head of a Household which included one "All Other Free Persons" along with 9 Free White Persons.

Might this "other" person be Zilph, who was brought to Wells in 1764 by Joseph and Mary Wheelwright, or Charles, who was brought to Wells by Nathaniel and Abigail Wheelwright as an infant in 1744?

Bibliography:

1790 US Census for Wells

1800 US Census for Wells