Alethea Garstin (1894–1978) was a Cornish artist and illustrator; she was the daughter and pupil of painter Norman Garstin.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Alethea_Garstin
The Reverend Charles Francis Benthall on Holiday in Morocco by Alethea Garstin
c.1925 / Oil on canvas / 39″x31-1/10″ / Benthall Hall, Shropshire, UK
Alethea Garstin on Artnet: http://www.artnet.com/artists/alethea-garstin/
Ruth Armer (May 26, 1896-August 29, 1977) was an American abstractionist painter, lithographer, teacher, and art collector from the San Francisco Bay area in California.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Ruth_Armer
Abstraction #250 by Ruth Armer
c.1950 / Oil on canvas / 24″x20″ / Private collection
Ruth Armer on Artnet: http://www.artnet.com/artists/ruth-armer/
Marisa Merz (May 23, 1926-July 20, 2019) was an Italian artist and sculptor. In 2013 she was awarded the Golden Lion for Lifetime Achievement at the Venice Biennale.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Marisa_Merz
Untitled (Living Sculpture) by Marisa Merz
1966 / Aluminium / Overall displayed dimensions variable / Tate London, UK
Marisa Merz on Artnet: http://www.artnet.com/artists/marisa-merz/