V-CVbav-ms-Capp.Sist.63: Composer name in ms = 'Prioris' / Fol. 55r: [Superius] and [Tenor] of secunda pars by mistake copied without text; the same music appears on fol. 56v (i.e. in proper sequence), with text. It is not clear how the scribe could have produced this rather odd duplication.