Commentary Par IX 13

To mark the change in personnel, or scene, Dante uses once again (and for the twentieth time) the formulaic ed ecco.  Cf. [Inf I 31]; [Inf III 82]; [Inf XIII 115]; [Inf XVII 1]; [Inf XXIV 97];[Inf XXXIV 20]; [Purg II 13;]p Purg.II.119; p Purg.III.62; p Purg.X.100; p Purg.XIII.35; p Purg.XIV.137; p Purg.XV.142; p Purg.XXI.7; p Purg.XXIII.10; p Purg.XXIII.40; p Purg.XXVIII.25; p Purg.XXIX.16; p Par.V.105; here (p Par.IX.13); p Par.XIV.67; p Par.XXIII.19*.