Jonathan Stone was one of the several early settlers of Kennebunkport (then named Arundel) who were enslavers.

"A few of the inhabitants of Arundel were able to hold slaves. Mr. Prentice bought the first one owned in town, in 1734. Mr. Hovey also owned one, and probably sold him in 1747. Robert Cleaves, Thomas Wiswall, Samuel Hutchins, John Fairfield, Gideon Walker, Andrew Brown, and Jonathan Stone each owned a slave. Several of them were living in the town, but a few years since, the last two of whom died in the poor house, or which the son of the former master of one of them was an inmate." - Bradbury, pp. 158

"In the Mass. Hist. Soc. Coll. It is said there were two male, and one female slaves in Arundel in 1754. The female belonged to Jonathan Stone, and was appraised at £300 old tenor in the inventory of his estate, in 1756." - Bradbury, p. 158 footnote

The 1756 probate abstract for Jonathan Stone of Arundel includes "A Negro girl at £40." It is unclear whether this refers to the same individual as Bradbury's reference to a female appraised at £300 old tenor in the inventory of his estate, in 1756."

Stone was survived by his wife Hannah Lovet Stone, and it is presumed that she inherited the "Negro girl." She subsequently married Capt. John Fairfield, and presumably also inherited the "Negro girl" that was included in his estate inventory.

Bibliography:

History of Kennebunk Port from its First Discovery (1602-1837) - Charles Bradbury

Maine Probate Abstracts Vol I 1687-1775 - John Eldridge Frost (1991)