William Jackson married Abigail Robinson in Worthington, MA,on Mar. 3, 1820. Both were described as being "coloured". He appears in the 1840 census with 11 people in his household. In 1830, he owned his own home in Amherst, Massachusetts.
Sources Consulted
History of the Black Population of Amherst, Massachusetts, James Avery Smith, 1999, p. 20