[Kessels 1987] argues that La Rue based his setting neither on a folk song nor on one of the three-part arrangements, which are instead "imitations" of La Rue’s setting.
B-Br-ms-IV-90: Incomplete due to lost folio between fol. 25 and 26: from '... heel u eyghen zo willic zyn' on / Superius and Tenor parts were exchanged: the Superius part was copied into the Tenor partbook, and the Tenor into the Superius partbook.
B-Br-ms-IV-1274: Incomplete: first part is missing due to lost folio between fol. 13 and 14
V-CVbav-ms-Vat.lat.11953: Title as in ms = 'Mein herz alzit' / Text: incipit only
