Sketch of a chaplet firmly wedged between the core and the outer mold, with a protruding point securing it in place in the clay on one side. This is one of many notes that Leonardo made in connection with the casting of the Sforza Horse. Leonardo da Vinci (Italian, 1452–1519), Madrid Codex II, 1503–5, fol. 156r (Biblioteca Nacional de España, Ms. 8936).