business. His steel enterprises were bought out for $303,450,000. Carnegie's share of this amounted to $225.64 million (in , $), which was paid to Carnegie in the form of 5%, 50-year gold bonds. The letter agreeing to sell his share was signed on February 26, 1901. On March 2, the circular formally filed the organization and capitalization (at $1.4 billion – 4 percent of the U.S. gross domestic product (GDP) at the time) of the United States Steel Corporation actually completed the contract. The bonds were to be delivered within two weeks to the Hudson Trust Company of Hoboken, New Jersey, in trust to Robert A. Franks, Carnegie's business secretary. There, a special vault was built to house the physical bulk of nearly $230 million worth of bonds. Scholar and activist 1880–1900 Carnegie continued his business career; some of his literary intentions were fulfilled. He befriended the English poet Matthew Arnold, the English philosopher Herbert Spencer, and the American humorist Mark Twain, as well as being in correspondence and acquaintance with most of the U.S. Presidents, statesmen, and notable writers. Carnegie constructed commodious swimming-baths for the people of his hometown in Dunfermline in 1879. In the following year, Carnegie gave £8,000 for the establishment of a Dunfermline Carnegie Library in Scotland. In 1884, he gave $50,000 to Bellevue Hospital Medical College (now part of New York University Medical Center) to found a histological laboratory, now called the Carnegie Laboratory. In 1881, Carnegie took his family, including his 70-year-old mother, on a trip to the United Kingdom. They toured Scotland by coach, and enjoyed several receptions en route. The highlight was a return to Dunfermline, where Carnegie's mother laid the foundation stone of a Carnegie Library which he funded. Carnegie's criticism of British society did not mean dislike; on the contrary, one of Carnegie's ambitions was to act as a catalyst for a close association between English-speaking peoples. To this end, in the early 1880s in partnership with Samuel Storey, he purchased numerous newspapers in Britain, all of which were to advocate the abolition of the monarchy and the establishment of "the British Republic". Carnegie's charm, aided by his wealth, afforded him many British friends, including Prime Minister William Ewart Gladstone. In 1886, Carnegie's younger brother Thomas died at age 43. While owning steel works, Carnegie had purchased at low cost the most valuable of the iron ore fields around Lake