John Singer Sargent’s Betty Wertheimer
http://jssgallery.org/Paintings/Wertheimer_Paintings/Betty_Wertheimer.htm
Betty Wertheimer
John Singer Sargent -- American painter 
1908 
National Museum of American Art. Smithsonian Institution, Washington, D.C.
Oil on canvas
128.3 x 100.0 cm (50 1/2 x 39 3/8 in)
Gift of John Gellatly
1929.6.107
Jpg: thegallerychannel.com/ mericanart.si.edu