Mary Campbell, nee Mary Margaret Garman (1898-1979) was the eldest of the Garman sisters, the seven daughters (and two sons) of Walter and Margaret Garman, an eccentric Victorian doctor, who lead notoriously high profile lives within mid 20th century artistic circles. Having grown up in the bleak surroundings of the 'Black Country' at Oakeswell Hall, Wednesbury, in England they were prominent in London's Bohemian Bloomsbury set, between the two world wars. Wikipedia
The definitive Wikipedia entry for Mary Garman. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Mary_Garman