Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. John Canfield Spencer was an American lawyer, politician, judge and United States Cabinet secretary in the administration of President John Tyler. He was the son of Chief Justice Ambrose Spencer. He graduated from Union College in 1806, became secretary to New York Governor Daniel D. Tompkins in 1807, studied law in Albany, New York and was admitted to the bar in 1809, commencing practice in Canandaigua, New York. He married Elizabeth Scott Smith in 1809 and became a master of chancery in 1811. During the War of 1812, Spencer served in the United States Army where he was appointed brigade judge advocate general for the northern frontier. He was postmaster of Canandaigua, New York in 1814, became assistant attorney general and district attorney for the five western counties of New York in 1815 and was elected a Democratic-Republican to the United States House of Representatives in 1816, serving from March 4, 1817, to March 3, 1819