US-Cn (Chicago, IL, The Newberry Library)
Folio C6 is lacking.
later / modern binding
A3r: “De Tonis” in ink in the margin. A3v: small addition in the margin, hard to read (“Mutatio…”). Later pencil foliation.
Inside front binding: “Ex libris Alfred Cortot”. Inside back binding: Former call number, Cortot 58. “Gift of Marie-Louise Rosenthal.” Stamps on bottom right recto of two leaves (A1, B4), light green ink, something like “C” over “A”? (something to do with Alfred Cortot collection?)