Anonymous IV (jan 1, 1270 – jan 1, 1280)

Description:

wrote a treatise that describes music at
Notre Dame (De mensuris et discantu). He was likely an English student studying at Notre Dame de Paris. (DATES HERE ARE FOR "DE MENSURIS ET DISCANTU" SPECIFICALLY)

a. Anon. IV tells us that the best maker of organum (organista) is
Leoninus magister (Master Leonin). Leonin made a “great book” of organum: Magnus liber
organi.
b. Anon. IV also reports that Perotinus magnus (the great Perotin) was the
best composer or discant (discantor)—even better than Leonin.
c. Perotin inserted clausulae into Leonin’s works.

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