A rare and unusual vellum leaf from the Calendar in a Book of Hours. Text in brown, blue, red and gold leaf. The recto includes a beautifully painted floral panel including a drollery composed of a strange looking dog sporting a hat. The text incorporates the calendar for October and begins with an elaborate foliate initial with the letters KL for 'kalender'. Every Book of Hours started with a calendar to indicate which saints were to be invoked on a certain day. Saint Denis, who was killed in Paris and after whom Montmartre was named, is included indicating the leaf probably originated in a Paris scriptorium