 Despite living in England most of his life, he remained a French citizen and was an Officier de la Légion d'Honneur as well as a CBE.After "The History of the Champagne Trade in England", Simon wrote perhaps his most distinctive book, "The History of the Wine Trade in England from Roman Times to the End of the 17th Century", in three volumes (1906, 1907 and 1909).During World War I he wrote his biggest seller, "Laurie's Elementary Russian Grammar", which was printed in huge numbers by the British War Office.