Craig lived with the painter Hannah Gluckstein GLUCK, whom she had met at the St John's Wood School of Art.  Together they spent summers in Lamorna and winters in a Finchley Road (north London) flat, visiting Lamorna regularly from 1915 until they gradually drifted apart by 1936.

A likeness of Effie, Portrait of Miss E M Craig, 1920 by Gluck is footnoted 'The pernicious influence?' (Gluck's mother's judgement).  Effie earned a meagre income from her designs and illustrations, and was largely supported by the independently wealthy Gluck in the early days. Craig was to become totally blind in middle age, which truncated her artistic career. They remained friends until Craig's death in 1968.