Robertus de Handio and Johnannes Hanboys. Rules and the Summa. Greek and Latin Music Theory.

“For this edition, Lefferts has thoroughly reexamined, edited, and appraised the single extant source of each treatise. Full descriptions of these sources are provided and the documents are illustrated with a plate from each. Each treatise is presented in its original Latin, with a fully annotated translation on facing pages. Leffert’s introduction discusses the authors, places the treatise in the context of the theoretical traditions of fourteenth-century France and England, and reviews their contents in detail. Indexes of terms, names, and subjects are included. Appendixes provide a concordance to the music examples from the Regule that recur in the Summa and transcriptions of two English motet fragments that exhibit insular notational practices discussed in the treatises. Leffert’s work will be seen as a major contribution to our understanding of medieval English music.”