March Mr & Mrs E. Cooper leave the Rectory Cottage at Borley

 June HP elected member of Society for Psychical Research (SPR)

 January 16 Eighteenth Amendment to US Constitution banning alcohol comes into force

 June 9 Imperial War Museum opened by George V at Crystal Palace

 August 22 Writer Ray Bradbury born

 February 3 US premiere of Charlie Chaplin's The Kid

 March 17 First birth control clinic opens in London

 August 3 Tenor Enrico Caruso dies

 November 7 Mussolini declares himself 'Il Duce', leader of Fascist Party

 February 24 HP exposes William Hope at British College of Psychic Science

 April HP visit to Germany

 May 29 HP has first séance with Willi Schneider in Munich

 Revelations of a Spirit Medium published in collaboration with E.J. Dingwall

 January 5 Explorer Sir Ernest Shackleton dies

 February 25 Murderer 'Bluebeard' Landru is guillotined

 April 12 Actor Roscoe 'Fatty' Arbuckle acquitted of murder charge

 August 22 Irish politician Michael Collins shot dead 

 November 29 Howard Carter uncovers tomb of Tutankhamun

 January HP meets Stella Cranshaw (Stella C.) and arranges series of séances

 March 22 Séance No. 1 with Stella C.

 March 29 Séance No. 2 with Stella C.

 April 5 Séance No. 3 with Stella C.

 April 12 Séance No. 4 with Stella C.

 April 19 Séance No. 5 with Stella C.

 May 3 Séance No. 6 with Stella C.

 May 10 Séance No. 7 with Stella C.

 May 16 Writer & ghost-hunter Peter Underwood born

 May 17 Séance No. 8 with Stella C.

 May 24 Séance No. 9 with Stella C. 

 June 7 Séance No. 10 with Stella C.

 June 21 Séance No. 11 with Stella C.

 August HP attends International Congress for Psychical Research in Warsaw - tests medium Jean Guzik

 September 26 Collection of rare coins stolen from Pulborough Church

 September 27 Séance No. 12 with Stella C.

 October 14 Séance No. 13 with Stella C.

 January 27 National Socialist Party holds first rally in Munich

 March 9 Lenin steps down as Bolshevik leader after stroke

 July 20 Mexican revolutionary Pancho Villa is murdered

 September 16 Massive earthquake rocks Tokyo

 November 12 Hitler arrested after beer-hall putsch

 December 28 French engineer Gustave Eiffel dies

 HP discusses telepathy experiments with BBC

 May Report of Stella C. sittings published in Journal of the American SPR

 January 21 Lenin dies

 February 12 George Gershwin's Rhapsody in Blue first performed

 November 29 Composer Giacomo Puccini dies