Adémar de Chabannes (989-1034), monk at the abbey of Saint Cybard in Angoulême, historian, homilist, polemicist and musician extraordinaire, left behind some 451 folios of music with notation written in his own hand. These documents constitute the earliest identifiable musical autographs by several centuries. They provide essential data for musical practices at Saint Martial, where Adémar contributed to their production, and for Adémar's personal and professional involvement in those practices. They also attest the introduction to the scriptorium at Saint Martial by Adémar of accurately heighting the neumes (symbols of musical notation) above the text to which the melody is sung. Each pitch, therefore, receives a distinct position along the...