Fourth edition, second printing. xxvi, 462, [30]pp. Green cloth-covered boards with gilt titles to spine. 4to. Cloth is marked, gently rounded at corners and a little bruised at spine tips. Gift inscription, dated 1949, inked on the front free endpaper else internally neat, clean, bright and tight.
A scholarly and thorough examination of the musical notation used in the medieval period for polyphonic music (that is, music with two or more simultaneous melodies).
