The short-robed doctors of St. Cosme entered into an agreement with the barber surgeons of Paris that they would offer the barber surgeons secret lessons on human anatomy as long as they swore to be dependents and supporters of the short-robed physicians. This secret deal existed from around the time of the founding of St. Cosme in 1210 until 1499, when the group of surgeon barbers asked for their own cadaver to perform their anatomical demonstrations. From the 1540s in France, the translation into French of the works of ancient authors allowed progress in the transmission of knowledge: barber-surgeons could add to their manual skills, an ancient surgical knowledge confronted with their actual practice.