Musical notation in black on five-line red staves ; sung texts in black ink ; liturgical rubrics and large initials in red. ; The second folio numbered 7 on the recto and 8 on the verso. ; Damaged bifolium, recovered from a binding, is from a signature ; intervening bifolia are lacking. ; Title supplied by cataloguer. ; Gregorian chants associated with the feasts of Sanctae Trinitatis, Corporis Christi, De Sapientia and Dominica prima Septembris [texts from the Book of Job]. ; Mode of access: Internet. ; Holding in McGill Library's Rare Books and Special Collections: presented by Colonel W. G. Scully. Redpath Library, McGill University, April 1944. ; Holding in McGill Library's Rare Books and Special Collections: 1 bifolium ; vellum ; unbound. ; Description based in part on a long description made by specialist Dionysios Hatzopoulos in the late 1980s and early 1990s in collaboration with McGill librarian Richard Virr. ; Holding in McGill Library's Rare Books and Special Collections: presented by Colonel W. G. Scully. Redpath Library, McGill University, April 1944 ; Holding in McGill Library's Rare Books and Special Collections: 1 bifolium ; vellum ; unbound.