William P. Thompson

William Thompson, son of Roswell Thompson; born in New Hampshire, in August, 1833. Married in the fall of 1858 to Mary Brown, who was not related to the family of John Brown. His sister Isabel was married to Watson Brown, son of John Brown; and Henry Thompson, his elder brother, was married to Ruth, the daughter of John Brown. He had started for Kansas in 1856, but turned back after meeting the Brown sons, and returned with them to North Elba.

William Thompson was one of John Brown's group who seized the arsenal at Harpers Ferry; he was shot and killed.