14 – Louis Sullivan, American architect (b. 1856) April 19 – Paul Boyton, Irish-American extreme water sports pioneer (b. 1848) April 21 Marie Corelli, English novelist (b. 1855) Eleonora Duse, Italian actress (b. 1858) April 24 – G. Stanley Hall, American psychologist, educator (b. 1846) May May 4 – E. Nesbit, British author (b. 1858) May 5 – Kate Claxton, American actress (b. 1848) May 6 – Carel Steven Adama van Scheltema, Dutch poet (b. 1877) May 10 – George Kennan, American explorer (b. 1845) May 15 – Paul-Henri-Benjamin d'Estournelles de Constant, French diplomat, recipient of the Nobel Peace Prize (b. 1852) May 26 – Victor Herbert, Irish dramatist (b. 1859) June June 3 – Franz Kafka, Austrian author (The Trial) (b. 1883) June 9 Andrew Irvine, British mountain climber (lost on Mount Everest) (b. 1902) George Mallory, British mountain climber (lost on Mount Everest) (b. 1886) June 10 – Giacomo Matteotti, Italian socialist politician (assassinated) (b. 1885) June 11 Théodore Dubois, French composer, teacher (b. 1837) Jacob Israël de Haan, Dutch-Jewish literary writer, journalist (b. 1881) June 30 – Johannes von Eben, German general (b. 1855) July July 14 Isabella Ford, British socialist, feminist, trade unionist and writer (b. 1855) Isabella Stewart Gardner, American art collector, philanthropist (b. 1840) July 23 – Frank Frost Abbott, American classical scholar (b. 1860) July 27 – Ferruccio Busoni, Italian pianist, composer (b. 1866) August August 2 – George Shiras Jr., American Supreme Court Justice (b. 1832) August 3 – Joseph Conrad, Polish-born author (b. 1857) August 5 – Teodor Teodorov, 19th Prime Minister of Bulgaria (b. 1859) August 7 – Bruce Grit, African-American historian, ex-slave (b. 1856) August 8 – Ernestine von Kirchsberg, Austrian painter (b. 1857) August 15 – Francis Knollys, 1st Viscount Knollys, British Private Secretary to King Edward VII (b. 1837) August 17 Paul Natorp, German philosopher (b. 1854) Pavel Urysohn, Russian mathematician (b. 1898) August 18 – Antoine de Mitry, French general (b. 1857) August 25 – Mariano Álvarez, Filipino general (b. 1818) August 31 – Todor Aleksandrov, Bulgarian revolutionary (b. 1881) September September 1 – Samuel Baldwin Marks Young, American general, first Chief of Staff of the United States Army (b. 1840) September 6 – Archduchess Marie Valerie of Austria (b. 1868) September 11 – Muhammad Jamalul Alam II, Sultan of Brunei (b. 1889) September 15 – Frank Chance, American baseball player, MLB Hall of Famer (b.