Medieval manuscripts did not include title pages, and bibliographers identify them by incipit or opening words: no special markers were needed to recognize a book that one had commissioned and waited for while it was copied.185 By contrast, a printed book needed to ap-peal to buyers who had no advance knowledge of the book, so the title page served as an advertisement, announcing title and author, printer and/or book-seller (where the book could be purchased), generally a date of publication, and also additional boasts about useful features—“very copious indexes” or a “cor-rected and much augmented” text. T