Robert Todd Lincoln (August 1, 1843 – July 26, 1926) was an American lawyer and businessman. He was the eldest son of President Abraham Lincoln and First Lady Mary Todd Lincoln and the only one of their four sons to live past age 18. Lincoln became a business lawyer and company president, serving as both United States Secretary of War (1881–1885) and the U.S. Ambassador to Great Britain (1889–1893). Lincoln was born in Springfield, Illinois, and graduated from Harvard College. He then served on the staff of General Ulysses S. Grant as a captain in the Union army in the closing days of the American Civil War. After the war was over, Lincoln married Mary Eunice Harlan, and they had three children together. Following completion of his law school studies in Chicago, Lincoln built a successful law practice and became wealthy representing corporate clients. Lincoln was often spoken of as a possible candidate for national office, including the presidency, but never took steps to mount a campaign. He served as Secretary of War in the administration of James A. Garfield, continuing under Chester A. Arthur, and as Minister to Great Britain in the Benjamin Harrison administration. Lincoln became general counsel of the Pullman Company, and after founder George Pullman died in 1897, Lincoln assumed the company's presidency. After retiring from this position in 1911, he served as chairman of the board until 1924. In his later years, Lincoln resided at homes in Washington, D.C., and Manchester, Vermont; the Manchester home, Hildene, was added to the National Register of Historic Places in 1977. In 1922, he took part in the dedication ceremonies for the Lincoln Memorial. Lincoln died at Hildene on July 26, 1926, six days before his 83rd birthday, and was buried at Arlington National Cemetery.