Margaret Brundage (December 9, 1900-April 9, 1976) was an American illustrator and painter, remembered chiefly for having illustrated the pulp magazine Weird Tales.
Biography on Society of Illustrators site: https://societyillustrators.org/award-winners/margaret-brundage/
Cover of Weird Tales by Margaret Brundage
May 1934 / Ink on paper / Illustration size 10″x7″ / Norman Rockwell Museum, Stockbridge, MA
Margaret Brundage on Artnet: http://www.artnet.com/artists/margaret-brundage/