Design for a metalwork book cover, by Hans Holbein the Younger

Design for a Metalwork Book Cover. Pen and black ink with black, grey, and yellow wash on paper, 8.1 × 6 cm, British Museum.
This is a design for a book cover to be made with black enamel patterned over gold (Foister, p. 84). Small girdle books of this sort were attached to the belt by a ring, as drawn at the top. Clasps are shown to the right. The initials may be those of Thomas Wyatt the Younger, who was later executed for leading a rebellion in Kent during the reign of Queen Mary.