Betsey Stockton learned of plans by Charles S. Stewart, a student at
Princeton Theological Seminary and friend of the Green family, to go to
Hawaii (then known as the Sandwich Islands) as a missionary. She expressed a desire to go with him and his family, and Dr. Green and her
Sabbath school teacher wrote letters of recommendation to the
American Board of Commissioners for Foreign Missions. and provided that she was not to be more occupied with domestic duties than the other missionaries. The team (which included
William Richards) set sail on the ship "The Thames" from
New Haven, Connecticut on November 22, 1822, for a five-month voyage. The Stewarts and Stockton settled at
Lāhainā on
Maui. Stockton was the first unmarried woman from the U.S. to travel to Hawai'i as a missionary (most women accompanied their husbands), as well as the first African American to serve as a missionary in Hawai'i. She was the teacher of the first mission school opened to the common (non-chiefly) people of Hawaii. Along with being a missionary and teacher, Stockton also served unofficially as a doctor and nurse to a number of people in Hawaii. She also trained native Hawaiian teachers, who took over from her upon her departure until the arrival of another missionary. She returned with the Stewarts to the U.S. in 1825 due to Harriet Stewart's poor health. In 1835, the Presbyterian church building burnt down; the people of color attending the church decided to form their own congregation. In 1840, she helped found Princeton's First Presbyterian Church of Color, which in 1848 was renamed the
Witherspoon Street Presbyterian Church. She was buried in
Cooperstown, New York alongside the Stewart family. == Legacy ==