In the Middle Ages the cost of binding books was a considerable part of the overall expense of creating a manuscript, so, rather than bind short works individually, several different works--having more or less in common with one another--would often be bound together. This volume, of only 80 leaves, contains a dozen texts, originally written as several different sections. A late medieval list of contents and press-mark on a flyleaf shows that it used to contain even more texts, and belonged to the library at the abbey of Bury St. Edmunds. A hexachord is a scale of six notes (as opposed to the modern octave of eight notes), corresponding to ut, re, mi, fa, sol, and la (the modern equivalent is do, re, mi, . . .); the notes recognised in the Middle Ages were divided into seven haxachords.