Maginel Wright Enright Barney (June 19, 1881-April 18, 1966) was an American children’s book illustrator and graphic artist. She was the younger sister of Frank Lloyd Wright and the mother of Elizabeth Enright.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Maginel_Wright_Enright
Cover for Woman’s World, August 1919 by Maginel Wright Enright Barney
1919 / Ink, watercolor, gouache, and graphite on illustration board
17-1/8″x9-3/16″ / Delaware Art Museum, Wilmington, DE
Maginel Wright Enright Barney on Artnet: http://www.artnet.com/artists/maginel-wright-barney/