The men's long jump was one of four jumping events on the Athletics at the 1896 Summer Olympics programme. There were nine contestants in the long jump, held on 7 April. The American jumpers proved themselves dominant in taking the top three spots. Clark's first two jumps were fouls, but his third was by far the best of the field.
Lampros, S.P.; Polites, N.G.; De Coubertin, Pierre; Philemon, P.J.; & Anninos, C. (1897). The Olympic Games: BC 776 – AD 1896. Athens: Charles Beck. (Digitally available at la84foundation.org)
Mallon, Bill; & Widlund, Ture (1998). The 1896 Olympic Games. Results for All Competitors in All Events, with Commentary. Jefferson: McFarland. ISBN978-0-7864-0379-0. (Excerpt available at la84foundation.org)
Smith, Michael Llewellyn (2004). Olympics in Athens 1896. The Invention of the Modern Olympic Games. London: Profile Books. ISBN978-1-86197-342-9.