James Boswell's uncle John was a member of a sect known as the Glasites.
James FergusonBorn May 25, 1735
Died Sep 06, 1820
Life with Boswell:
Boswell breakfasted with James Ferguson and his brother Patrick on November 7, 1762, in Edinburgh. He dined or breakfasted with Ferguson on the next two days as well.
Note 1: According to "The House of Commons: 1509-1558; 3, Members N-Z, Volume 4", entry: James Ferguson