||Snow 2007: "A manuscript cuaderno from the XVIII century, catalogued by Barbieri, clearly torn from a larger compilation. Anglés [Catálogo Musical de la Bib. Nac. de Madrid (vol. I, Manuscritos, Barcelona: CSIC, 19??, p. 282] attributes great importance to it, believing it to be transcribed from the lost Cancionero del Conde de Marialva, from which Soriano Fuertes also made some transcriptions (1855, pp. 109ss and the 'Apéndice musical'), possibly from this manuscript copy. There are brief ad libitum transcriptions for refrains or refrain + stanza for cantigas 221, 256, 2, 10, 17, 6, 67, and 28 on the first folios (the last folios are not CSM)."