James Abram Garfield (November 19, 1831 – September 19, 1881) was the 20th president of the United States, serving from March 4, 1881, until his death by assassination six and a half months later. At Williams, he had become more politically aware in the school's intensely anti-slavery atmosphere, and began to consider politics as a career. In 1858, he married Lucretia; they had seven children, five of whom survived infancy. His finding was placed in the New England Journal of Education. Mathematics historian William Dunham wrote that Garfield's trapezoid work was 'really a very clever proof.