Cesáreo Fernández Duro Cesáreo Fernández Duro ( Zamora , 25 February 1830 - Zamora , 5 June 1908 ) was a Spanish naval captain , writer , scholar and historian . Biography . At the age of 15 years , in 1845 , Fernández Duro became a candidate in the Naval School of San Fernando . In 1847 he shipped as a midshipman on the " Isabel II " , sailing in the Caribbean for three years . In 1851 he embarked on the " Villa de Bilbao " for the Philippines , where he took part in the " Jornada de Joló " ( Day of Joló ) , near the island of Joló , now Sulu ) , in the Sulu Archipelago of the Pacific Ocean , between Mindanao and Borneo . For his courageous conduct during the battle , he received the Cross of the Order of San Fernando . Upon returning to Spain as first midshipman , he was assigned to the Canary Islands Hydrographic Commission . Despite his age and station , he was inducted as an honorary member of the Academy of Fine Arts in Santa Cruz de Tenerife . In 1853 , he sailed as an ensign aboard the corvette " Ferrolana " in the Mediterranean , visiting France and Italy . In 1857 he was appointed professor at the Naval College , being responsible for the text of Cosmography . In 1860 he took part in the Hispano - Moroccan War in command of the steamer " Ferrolano " , and drafted a report on the port , city and fortifications of Mogador . Subsequently he was awarded the Cross of the Royal Navy Diadem and the rank of Commander of Infantry for his distinguished service . He then returned to the West Indies and took part in the Prim expedition to Mexico as Secretary of the General Commander of Operations of the Fleet . After being stationed in the Naval Station at Havana , he returned to Madrid and held a post in the Ministry of the Navy . On the occasion of the mandate in Cuba of Capitán General Caballero de Rodas he was appointed by the Ministry of Overseas to the post of Secretary of the Government Superior of Cuba , ( 1869 – 70 ) . Still in Madrid , he participated in conferences and organized expeditions to Ifni , on the Atlantic coast of Morocco , to investigate the correct location of the ancient possession of Santa Cruz de la Mar Pequeña . He conducted research on Columbus and his lawsuits , the Santa Maria and the Galleon s , as well as writing historical works , including the " History of the Spanish Armada " ; also histories of Castile , the City of Zamora , and others . He participated in the archaeological study of the Santa Maria . Fernández Duro was then made aide - de - camp to King Alfonso XII , and because of his prestige , knowledge and experience , he was appointed arbitrator in determining the boundary between Colombia and Venezuela . In 1881 he entered the Royal Academy of History , and in 1898 he was appointed Perpetual Secretary of the same . Shortly before his death , being already seriously ill , he received the Award of Merit from the Academy . Cesáreo Fernández Duro wrote more than 400 publications including books , monographs , reports and memoirs , particularly on three subjects : the history of the Spanish Navy , the conquest of America and the history of the province of Zamora . On this last topic he wrote a collection of news - biographical literature relating to Zamora or materials for its history ( Madrid : Manuel Tello , 1891 ) , which was awarded in 1876 . The book is divided into three sections : a regional bibliography of works dealing with Zamora , a bibliography of works on the history of the press in Zamora and a bio - bibliography of famous Zamoran persons . As for his work on the history of the Spanish Navy , his History of the Spanish Armada from the Union of Castile and Aragon ( 1895 – 1903 ) in nine volumes , and his Nautical Disquisitions ( 1876 – 1881 ) in six , remain unsurpassed in their field today . References . Presentation by Admiral Guillen on the " La Armada Española " ( The Spanish Armada ) by Fernández Duro , edition issued by the Naval Museum , in Madrid in 1975 .