Glossocomion

Andreas Vesalius, De humani corporis fabrica libri septem, Basel: ex. off. J. Oporini, 1543, p. 329, initials E and F, N*.1.2[A]
This is an unusual use of the decorative initials in that instead of forming a word, the letters E and F are placed side by side for their pictorial content. They show a device called ‘glossocomion’ described by Galen to reduce the dislocation of the arm or a thigh. F shows a box splint from the side, and E from the front.