The Bach pupil Agricola - who became Kapellmeister at the court of King Frederick the Great after Graun’s death competently translated the work, adapted it to the vocal performance practice of the time, and furnished it with additional material to satisfy the taste prevalent in Germany back then. Tosi/Agricola’s Anleitung "is still regarded as the best book on the subject, in German, as the original in Italian", wrote the widely traveled Charles Burney in 1789.