sentences:  With his signature Jackson became the fortieth signer of the U.S. Constitution.Jackson was sent to the Congress of the Confederation, assembled in New York City, with a copy of the Constitution, and was honored to read it out to the Congress just days after the signing, on September 20, 1787.Major Jackson was admitted to the Pennsylvania Bar in 1788, but in those days, he had to wait two years to practice before the Pennsylvania Supreme Court, the most lucrative branch of the law; besides this, he was an (unpaid) volunteer in the Second Philadelphia Light Horse.