Franklin Mint – History of the US – Freemont Maps the West – 1842 – 45mm – Proof Bronze Medal. Spring – Dorr’s rebellion helps broaden suffrage in Rhode Island. June 10 – John C. Freemont begins the first of five western explorations. June 25 – District election of congressmen required by Apportionment Act. Aug 9 – Webster-Ashburton Treaty defines boundary of Maine and Canada.