Borthwick, Mamah Bouton, 1869-1914 Fiction. (Personal Name)

Key, Ellen Karolina Sofia. Love and ethics, c1912: t.p. (Mamah Bouton Borthwick)

LC manual cat. (hdg.: Borthwick, Mamah Bouton, d. 1914; usage: Mamah Bouton Borthwick)

Horan, Nancy. Loving Frank, c2007: ECIP data view (Mamah Cheney)

Wikipedia, Sept. 17, 2007 (Martha "Mamah" Borthwick; b. June 1869; d. Aug. 15, 1914; married Edwin Cheney, 1899 and formally known as Martha Borthwick Cheney; divorced 1911, and she stopped using her husband's name; murdered Aug. 15, 1914 at Frank Lloyd Wright's Taliesin, along with her two children and three of Wright's associates and another child) October 5, 2018 (Mamah Borthwick; Martha "Mamah" Borthwick (June 19, 1869-August 15, 1914) was a translator primarily noted for her relationship with Frank Lloyd Wright, which ended when she was murdered; born Boone, Iowa; died Spring Green, Wisconsin)

Building Taliesin, 2012.