[6] Throughout her marriage to the musician and composer John Cage – from 1935 to 1945 – Xenia performed in his percussion ensemble.

[9] The next year, Cage had a solo exhibition of her mobiles at the Julien Levy Gallery in New York.

[8] In 1947, she exhibited another abstract mobile called Black Trap at the Art Institute of Chicago's American Exhibition of Painting and Sculpture 58th Annual: Abstract and Surrealist American Art curated by Katharine Kuh.

[12][1] In 1935, she married John Cage; they divorced in 1945 when a ménage à trois with Merce Cunningham became a private affair between the two men.

[13] In a 1992 interview, John noted that their subsequent relationship had "not been particularly friendly", and said that due to her "barby" wit, "if I telephone her or write to her, I take my life in my hands".