She was born into slavery in Princeton, New Jersey, about the year 1798. While a child, her father Robert Stockton gave her to his daughter upon her marriage to Reverend Ashbel Green, president of the College of New Jersey (now Princeton University).
She remained as a paid domestic servant with the family, learned from reading in their library and home schooling by Doctor Green, and expressed a desire to go as a missionary to Africa. She also did some teaching at this time. She expressed a desire to go with them.
Doctor Green and her Sabbath school teacher wrote letters of recommendation to the American Board of Commissioners for Foreign Missions.
She was commissioned by the Board as a missionary, and became the first single American woman sent overseas as a missionary. Her contract with the Board and with the Stewarts said that she went "neither as an equal nor as a servant, but as a humble Christian friend" to the Stewarts, and provided that she was not to be more occupied with domestic duties than the other missionaries.
The team set sail from New Haven, Connecticut on November 22, 1822 for a five-month voyage. The Stewarts and Stockton settled at Lāhainā on Maui.
She was the teacher of the first mission school opened to the common (non-chiefly) people of Hawaii.
She also trained native Hawaiian teachers who took over from her upon her departure until the arrival of another missionary. She returned to the United States. in 1825 due to Mistress Stewart"s poor health.
A version of her Hawaiian diary was published in the Christian Advocate by Doctor Green in 1824 and 1825.
She stayed with the Stewart household until at least 1830. She taught briefly at an infant school in Philadelphia, Pennsylvania, established a school for Indians at Grape Island, Canada, and then returned to Princeton in 1835 and taught in its school for blacks until her death on October 24, 1865.
She was buried in Cooperstown, New York alongside the Stewart family.
