No, John, you're thinking of
Dora Carrington (no relation, apparently).
Anhyway, while I'm here, I'll just put in a plug for
Carrington, the delightful film about her (that is,
Dora C's) life, with the ever-beautiful Emma Thompson as the title character, and Jonathan Pryce as a wonderfully EdwardLearish (how pleasant to know!) Lytton Strachey.