Series 1 contains essays, poetry, published and unpublished articles, and clippings about Castellano's work. Research materials relating to Castellano's academic and literary work include notes and notebooks and copies of printed materials related to his work.
Photocopies of "Guerra hispano-americana; colección de documentos referentes á la escuadra de operaciones de las Antillas" by Pascual Cervera y Topete.
Photocopies of articles and of military maps from the Cuban War of Independence, "13 Conclusiones Fundamentales sobre la Guerra Libertadora Cubana de 1895" by Emilio Roig de Leuchsenring and military maps.
Official photocopies of the original documents regarding the Spanish frigate Tornado, which came from the Archivo General del Museo de la Marina "Alvaro de Bazan."