Ms. written and illuminated in Naples, Italy, in the last quarter of the 14th century.
Texts: Master Matthew, Canon of Linköpins, Sweden, Stupor et mirabilia audita sunt (fol. 1-7v); Saint Bridget of Sweden, Revelationes (fol. 8-327); Alfonso Pecha, Epistola solitarii ad Reges (fol. 328-340); Saint Bridget of Sweden, Liber coelestis imperatoris ad reges (fol. 340v-390v); Sermone angelico de excellentia beatissime virginis (fol. 391-408v); Oratines divinitus revelatae (fol. 409-414).
Pierpont Morgan Library. MS M.498 is manuscript "Y" in the Uppsala publications of the edited works of Saint Bridget of Sweden.
Decoration: 2 full-page miniatures, 12 historiated initials.