Louis Perceau (22 September 1883 – 20 April 1942) was a 20th-century French polygraph. He used several pseudonyms including Helpey bibliographe poitevin, Dr. Ludovico Hernandez, Alexandre de Vérineau, Un vieux journaliste, Radeville et Deschamps, marquis Boniface de Richequeue, sometimes jointly with Fernand Fleuret. Source: Wikipedia (en)