Folding Calendar[between 1250 and 1300]freManuscript on parchment of Folding Calendar, containing calendar, and 1) computistical and liturgical notes; 2) method for calculating Easter; 3) "dangerous days" of each month; 4) biblical prognostication; 5) History of Adam and Eve, and early biblical chronologyScript: Copied by two hands in Northern Gothica Textualis Libraria; the final pages, ff. 26-27, are in a more rapid hand.In French.