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/

Further reading:
http://tworedroses.com/newsletters/newsletter09012018.html
https://www.juliehellergallery.com/ethel-mars
http://jcsm.auburn.edu/art-is-pride-a-look-at-the-lives-of-maud-hunt-squire-and-ethel-mars/