In the context of Portrait of a Musician, analyze the Sheet music of the Description.
The stiffly folded piece of paper, which is held in an odd and delicate manner, is a piece of sheet music with musical notes and letters written on it. Due to the poor condition of the lower part of the painting, the notes and letters are largely illegible. This has not stopped some scholars from hypothesizing what the letters say, often using their interpretations to support their theory of the musician's identity. The partially erased letters can be made out as "Cant" and "An" and are usually read as "Cantum Angelicum", Latin for 'angelic song', although the art historian Martin Kemp notes that it could be "Cantore Angelico", Italian for 'angelic singer'. The notes have offered little clarity into the painting, other than strongly suggesting that the subject is a musician. They are in mensural notation and therefore probably show polyphonic music. Leonardo's surviving drawings of rebuses with musical notation in the Print Room of Windsor Castle do not resemble the music in the painting. This suggests that this musical composition is not by Leonardo, which leaves the composer and the significance of the music unknown.
Print Room Latin Sheet music musical notes Martin Kemp Italian rebus sheet music polyphonic music mensural notation Windsor Castle