Benjamin Cole of 136 Fleet Street, London
John Troughton (c.1716–1788) was in the scientific instrument trade in London, and trained his nephew John Troughton (c.1739–1807); John in his turn took a younger brother as apprentice. After this brother died, another brother, Edward (1756-1835) replaced him; Edward had learned his trade from his uncle, John Troughton.
1826 Edward Troughton took William Simms, an excellent craftsman and businessman, into partnership; Troughton and Simms manufactured mathematical instruments both large and small, and attracted customers around the world.
Sources of Information
-  Wikipedia entry