Among Vivaldi's many flute and recorder concertos, two, both for transverse flute, were known until a few years ago only in incomplete form: RV 431 and 432. Both are written in the comfortable and expressive key of E minor, aretransmitted in autograph manuscripts and lack their second movement (RV 432 also lacks its third movement). The seemingly enigmatic instruction Grave sopra il libro replacing the second movement has given rise to the most fancifulhypotheses. The discovery in Edinburgh, in