Suicides by cyanide poisoning

Marian "Clover" Hooper Adams (September 13, 1843 – December 6, 1885) was an American socialite, active society hostess, and arbiter of Washington, DC, and an accomplished amateur photographer.

Ponnuthurai Sivakumaran (Tamil: பொன்னுத்துரை சிவகுமாரன்; 26 September 1950 – 5 June 1974) was a Sri Lankan Tamil rebel and the first Tamil militant to commit suicide by swallowing cyanide.

Leonard Thomas Lake (October 29, 1945 – June 6, 1985) was an American serial killer who often used the alias Leonard Hill.

Walter John Burton (1836–1880) was a New Zealand nineteenth-century photographer.

Frank Tyndall Broun (31 May 1876 – 1 April 1930) was an Australian politician who was a member of the Legislative Assembly of Western Australia from 1911 to 1914 and again from 1917 to 1924.

Kim Won-bong (김원봉, 金元鳳, August 13, 1898 – c.1958) was a Korean anarchist, independence activist, and statesman from North Korea.

John Menlove Edwards (18 June 1910 – 2 February 1958) was one of the leading British rock climbers of the interwar period and wrote poetry based on his experiences of climbing.

Gustav Johannes Wied (6 March 1858 – 24 October 1914) was a Danish writer.

Bent Faurschou Hviid (January 7, 1921 – October 18, 1944) was a member of the Danish resistance group Holger Danske during World War II.

Kunihiko Hashida (橋田 邦彦 Hashida Kunihiko, 15 March 1882 – 14 September 1945) was a Japanese physician and physiologist.

Florence Carter-Wood (4 September 1888 – 24 July 1914) was a British painter.

Alexander Dmitrievich Ogorodnik (Russian: Александр Дмитриевич Огородник, 1939 – June 22, 1977) was a Soviet diplomat who, while stationed in Bogotá, was contacted by the Colombian intelligence agency and the CIA to spy on the Soviet Union, operating under the code name Trigon.

Major John Inglis Gilmour DSO, MC & Two Bars (28 June 1896 – 24 February 1928) was a World War I flying ace.

George Charles Cecil Black (1904 – 17 October 1932) was a member of the House of Representatives for Motueka electorate, in the South Island of New Zealand, initially as a representative of the United Party and from early 1931 as an Independent.

George Sterling (December 1, 1869 – November 17, 1926) was an American poet and playwright based in California who, during his lifetime, was celebrated on the Pacific coast as one of the great American poets, although he never gained equivalent success in the rest of the United States.

James Whitaker Wright (9 February 1846 – 26 January 1904) was a company promoter and swindler, who committed suicide at the Royal Courts of Justice in London immediately following his conviction for fraud.

Manuel Acuña Narro (27 August 1849 – 6 December 1873) was a 19th-century Mexican writer.

Noel Mewton-Wood (20 November 1922 – 5 December 1953) was an Australian-born concert pianist who achieved international fame on the basis of many distinguished concerto recordings during his short life.

Lt. Colonel Douglas McGlashan Kelley (11 August 1912 – January 1, 1958) was a United States Army Military Intelligence Corps officer who served as chief psychiatrist at Nuremberg Prison during the Nuremberg War Trials.

Jean-Joseph Rabearivelo (4 March 1901 or 1903 – 22 June 1937), born Joseph-Casimir Rabearivelo, is widely considered to be Africa's first modern poet and the greatest literary artist of Madagascar.

Lieutenant Alfred Victor Blenkiron MC (4 July 1896 – 20 March 1920) was a British World War I flying ace credited with five aerial victories.

Veronique Delphine Delamare (1822 – 8 March 1848), born Couturier, was a French housewife who took numerous lovers and later committed suicide.