British lawyer and agriculturist. So respected for his knowledge that he was known as the “Omniscient Jackson.”

As a scientist, became known to Franklin through correspondence with Peter Collinson.

Member of Parliament (1762-84). Agent for Connecticut (1760-71), Pennsylvania (1763-70), and Massachusetts (1765-67). Opposed the Stamp Act. Worked with Franklin on several important and controversial pamphlets concerning colonial affairs.

Probably born in or around London.