 After Gorsky departed St. Petersburg in 1900 to take up the post of Ballet Master to the Bolshoi Theatre of Moscow, the former dancer of the Imperial Theatres Nicholas Sergeyev took over the project as supervisor.By 1903 Sergeyev was appointed "régisseur" of the Imperial Ballet.It was Sergeyev's assistants who created the majority of the notation, all of whom were dancers with the imperial ballet