| Comparison of the automaton's head with an engraved 
            portrait of San Diego de Alcalá, from the auction catalogue 
            Très importante collection de tableaux Espagnols du XIIIe 
            au XVIIIe siècle [. . .] (Geneva, 1976) p 84; rpt. in José 
            A. García-Diego, Los relojes y autómatas de Juanelo 
            Turriano (Madrid, 1982) p LXI. |