[1] Chapin graduated from Harvard College in 1823, studied medicine under a doctor in Boston, and became a physician in Springfield, Massachusetts.
[1] In 1831, Chapin moved back to Brattleboro, where he gave up the practice of medicine for a career in business and public service.
[1][6] On several occasions, Chapin was appointed as disbursing agent for funds used in the construction of state government buildings in Southern Vermont, including facilities in Rutland and Windsor.
[9] In 1853, Chapin was appointed United States Marshal for the District of Vermont, succeeding John Pettes.
[12] The home, now known as the Deacon John Holbrook House, was added to the National Register of Historic Places in 1982.
[13] It is near the Deacon John Holbrook House, covers one block between Oak and Linden Streets, and was constructed on land previously owned by Chapin.