Ethel Mars (September 19, 1876-March 23, 1959) was an American woodblock print artist and children’s book illustrator.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Ethel_Mars_(artist)
Untitled (Woman at Shop Window) by Ethel Mars
c.1905 / Color woodblock print / 7-7/8″x6-1/8″ / Indianapolis Museum of Art, Indianapolis, IN
Ethel Mars on Artnet: http://www.artnet.com/artists/ethel-mars/