Detail from the autograph of the Cantata pastorale, 1716: Non sò qual più m'ingombra
Source: Musiksammlung der Staatsbibliothek, Berlin
Detail from the autograph score of Cantata da camera: Ombre tacite e sole, 31.10.1716
Source: British Library
Both the above cantatas are available for purchase through this site.
The Composer's Words
"Where it is marked grave, I don't mean melancholy; where andante, not quickly, but pleasing. Where allegro, not rushing; where allegrissimo, so that it doesn't trouble the singer nor choke the words..."