He collaborates in del Sol. For some time he is a collaborator of the Centre for historical studies. In 1931 is a candidate for action Republican for Congress to cuts for the province of Las Palmas. In 1934 he was appointed member of the Royal Academy of history. In 1936 he moved to Paris and Hendaye. In 1937 it is attached to the Faculty of philosophy and letters at the University of Valencia. His wife in France died the following year.
In 1939 embarked toward Mexico with the position of Vice-Consul of the Government of the Republic Spanish and finished the war provoked by the military rebellion of general Franco was exiled in Mexico. Immediately it becomes part of the House of Spain, which was later to become the College of Mexico. Member of the Union of Spanish university students teachers abroad and member of the Board of Spanish culture, is also a Professor of Instituto Luis Vives, the Mexico City College and Hispano-Mexicana Academy. In 1941 he joined in the Universidad Nacional Autonoma of Mexico (UNAM), where he teaches Spanish Paleography, Latin, in addition to directing the Seminary of classical languages, and create and systematize language and literature the Bibliography of the American magazine of history section. He collaborates in the most important magazines of the Spanish exile Spain Pilgrim, Romance, the Spains, overseas and American notebooks, remain on the Board of Directors of the latter.
In Spain Peregrina (1 September 1940), he published a collection of Hispanic literary production from July 18, 1936 until December 31, 1938. After more than twenty years living in Mexico in 1959 thousands moved to Venezuela, where he is appointed director of the General library of the University of Zulia and Professor of the new Faculty of Humanities, which performed his studies Venezuelan, thanks to a research grant that was awarded the OAS for a period of two years. It continues in Venezuela until his retirement, teaching already in Maracaibo, already in Caracas. During the years he lived in Mexico only went to El Salvador to give a course of Spanish literature at the University, and in the 1950s visited his native land. In 1963 it is spare in his chair in Palaeography of the Complutense University of Madrid. Dead dictator he definitively returned to Spain in 1975 and collaborates in the Cultural Plan of the Cabildo de las Palmas and is teaching, during 1978-1979, palaeography and diplomatic in the associate Center of the palms of the University National de Educacion a Distancia (UNED). In 1963, Agustin Millares admitted as a corresponding member of the National Academy of history of Venezuela, in 1965, is invested doctor honoris causa by the University of Zulia, in 1969. the Academy of American Franciscan History, from the United States capital, gives the Fray Junipero Serra Award for the work carried out and the quality of the same, in 1970, is distinguished with the title of favourite son of the city of Las Palmas de Gran Canaria, in 1974, was granted the order of Francisco de Miranda, and in 1976doctor honoris is invested causa by the University of la Laguna. Federico Carlos Sainz de Robles rightly said this universal Canario: and must be taken into account that being his specialty of thousands, very special Paleography, discipline in which Francisco Arias Solis has no competitor throughout the Hispanic world. Cadiz with Garzon. Democrats with the judge BALTASAR GARZON Association by a democratic justice and a dignified judiciary. Internet for peace and freedom and free forum.