The same want of appreciation extends to bindings. As a rule a book in a fine mediaeval binding sells for no more than if it were in a modern binding by Bedford. It is only the sixteenth century bindings of so-called "Grolier style" and the like which add largely to the value of a book.
This library is now deposited in the Guildhall; the press-mark is probably that of an old monastic library.
Probably a blundered version of Pliny's statement (Hist. Nat. XXXVII. 119) that azure blue (cyanus) was invented by a king of Egypt.
This is evidently a different thing from the epicausterium or brazier for hot coals mentioned below. My friend Mr J. T. Micklethwaite suggests that it was a board covered with leather on which to stretch and dry vellum before writing on it.
An explanation of the nature and constitution of the Breviary will be found in the preface to the Psalter-volume of the Cambridge University Press edition of the Sarum Breviary, lately published.