This project will examine the story of the creation and recreation of the Satanella pas de deux, which was created in the XIX century, but by the XX was believed lost only to reappear 50 years later. The mystery of the reappearance of it despite the lack of notation and the changes it underwent after its recreation are the focus of this research which will be linked to the view on the importance of the traditional, in-person transmission of classical ballet heritage from one generation to next.