John Martin, Ruth Page: An Intimate Biography (New York: Dekker, 1977), p. 61, corroborated by Balanchine, Ruth Page. Additional music information provided by Balanchine. Ruth Page’s letters and notebooks, housed in the Dance Division, mention these pieces and cite her partner, Michel Pavloff. (Although Balanchine recalled that Chester Hale was Page’s partner in these compositions, her collected papers reveal that it was Pavloff and that Hale was Page’s partner when she auditioned for Diaghilev.) Page material in the Dance Division provided by Andrew Wentink.