Script. Thompson notes that many features of the music script can give the impression of uniformity, suggesting that standards of copying the music text were in place before copying began. But her close inspection of the four manuscripts show distinct scripts. She makes a distinction between "music hand" ("the product of an individual's pen") and "music script" ("the form of notation, apart of who may have written it") and warns that excessive initial focus on the music hand can allow too many subjective decisions for a proper analysis. Thompson identifies two features which can reveal music script variations between different hands: the shape of white notes (that is, half notes) with stems below their noteheads, and the angle and the point of attachment of stems.