This is a large double folio with three written pages and the final page blank. It is classified as Folio 130 in batch 394 of "Royal Houses and Properties".
Its cover, with various annotations dating from the 19th century, includes another single folio quite different from the rest.
The paper, contents and notation are not at all uniform, indicating not only that the pieces were transcribed by more than one amanuensis but also that the pieces were intended for more than one recipient.
We have 1 facsimile edition of the manuscript "Seven musical scores belonging to Isabelle de Valois": Siete piezas en cifra entre los papeles de Isabel de Valois facsimile edition, published by Testimonio Compañía Editorial, 1998