Petipa’s dance, inserted into Le Roi Candaule sometime after its premiere in 1868, was a pas de trois, which Balanchine may have performed (see ROLES PERFORMED BY BALANCHINE, Love of Diana, 1922). In 1935, Agrippina Vaganova reworked Diana and Actaeon as a pas de deux, and in this form it has been frequently danced by Soviet and Russian dancers ever since. Balanchine may well have been familiar with both versions.
