On arrival at the peak of the Volcan de Nicaragua they hear the deafening sound of flames "como si fuera de una grande hornada de gavilla" but they were unable to reach the top of the Chimborazo on account of the heavy snow and rain storms; in Santa Elena they find mineral oil which they suggest will be useful in medicine and they believe that the discovery of gigantic pre-historic bones could be important in the study of natural history; they make a collection of plants and animals but these are eaten by the many insects in the area and reference is made to Cook's similar experience; they examine a milk-like substance extracted from banana leaves which when dry has similar qualities to "goma elástica" used as varnish; the letter indicates that the artist, Guio's, requirements were minimal needing little food and no servant: "no goza gratificación de mesa ni criado." The author and intended recipient of the letter are unidentified but this is probably a summary of Pineda's letter made by Valdés or his secretary (the top of the letter is marked "Pineda"). See document 1. Panama.