He resigned in 1791 to restart his law practice, and work as agent for William Bingham and Henry Knox (then Secretary of War), who were selling off a large land grant in Maine first acquired by William Duer, first Undersecretary of the Treasury and now bankrupt. Jackson's job was selling land on commission in England and France; among his potential customers was the Committee of Public Safety. They declined to invest their scanty funds in Maine land; but Jackson wrote a very favorable report on them back to the United States.