A posthumous impression of Albrecht Dürer’s first Knot has been tipped in opposite the frontispiece of this copy of On Human Proportion, Dürer’s book on anatomy for artists. It is the first element in a collected volume of late editions of several texts by the master (On Human Proportion, 1532–38, On Fortifications, 1527, and The Painter’s Manual, 1538). This second state of the woodcut is the only one to include an ad monogram. Dürer’s fame was already such that his eminently recognizable nested initials had become an ornamental motif in their own right. Annotations on the print’s verso date it to August 14, 1606, about when the sheet was reprinted and probably when it was purchased.