Born on October 7, 1735, in York, in that area of the Province of Massachusetts Bay that would eventually become the State of Maine, British America, Sewall received an Artium Baccalaureus degree in 1755 from Harvard University and read law in 1760. He entered private practice in York (District of Maine, Massachusetts from October 25, 1780) starting in 1760. He was register of probate for York County, Maine starting in 1766. He was a Justice of the Peace in Maine starting in 1767. He was a member of the York Committee of Correspondence. He was a member of the Legislative Council of Massachusetts (now the Massachusetts Senate) from 1776 to 1777. He was a justice of the Superior Court of Massachusetts (renamed the Massachusetts Supreme Judicial Court in 1780) from 1777 to 1789. He was a delegate to the Massachusetts constitutional convention from 1779 to 1780.[1]
Following his resignation from the federal bench, Sewall resumed private practice in York, District of Maine (State of Maine from March 15, 1820) from 1818 to 1825.[1]
