She became part of the Bloomsbury Group and a close friend of Virginia Woolf (March 29^th).  It has been suggested that Ka’s rejection of Brooke’s marriage proposal contributed to his breakdown and that ‘Ka’ Cox was Woolf’s inspiration for Mary Datchett in her, 1919, novel Night and Day. 

At one point it was planned that Woolf and Cox would share a house but the plans fell through. Very close friends, Cox saved Woolf when she took an overdose of sleeping tablets in 1913.

During the First World War she aided refugees in Corsica and, marrying the Labour politician Will Arnold-Forster (October 8^th), moved to Cornwall. After the armistice, Cox and her husband moved to Zennor to a house, ‘The Eagle’s Nest’ that had allegedly been used by the notorious occultist Aleister Crowley for black masses.

In 1920 she gave birth to their only child, the writer and journalist, Mark Arnold-Forster (1920–1981).   When he was seven, Mark was sent to boarding school in  Switzerland and, two years later, to Kurt Hahn’s Schule Schloss Salem.  In 1933, with Hitler’s rise to power, Hahn was forced into exile and was financially supported by Ka Cox and her husband with Mark becoming one of the first pupils at Hahn’s new school, Gordonstoun.

Despite living mainly in Cornwall both Cox and her husband remained politically and academically active, with Cox lecturing at the adult education institute, Morley College, and both working for womens’ suffrage and pacifist causes.

Whilst her husband was on a peace mission to the United States, Cox was suddenly taken ill on this day in 1938. 

The suddenness of her death two days later combined with her residence in a house associated with the occult gave rise to persistent rumours that she died in occult rituals. Such claims are without foundation as she was taken ill whilst visiting a friend who had flu.

Her relationships with Woolf and Brooke have been said to have linked together Woolf’s ‘Bloomsbury Group’ and Brooke’s ‘Neo Pagans’ and Woolf was keen on Brooke’s group particularly for the latter’s love of the outdoors.

Despite Cox’s rejection of Brooke’s proposal, they remained close friends and corresponded continuously during the War.  In his last letter to Ka dated March 10^th 1915, Brooke wrote that ‘I suppose you’re about the best I can do in the way of a widow’.