Clare Marie Veronica Leighton, sometimes Clara Ellaline Hope Leighton or Clare Veronica Hope Leighton, was an English–American artist, writer and illustrator, best known for her wood engravings. From Wikipedia
Held privately since the painter’s death, the 1931 piece is slated for a July 7–15 sale in London with a £50,000–70,000 estimate.
