 From 1992 to 1996, in his early eighties, he moved to Paris to work at the Muséum national d'histoire naturelle and published over 20 papers on his work on Lepidoptera.In 1996 the Spanish government recognized his endeavours to defend the Republic and declared him an honorary citizen of Spain.The same year, Jacques Chirac, then French President, granted him the legal status of former service personnel ("anciens combattants").