Duncan Grinnell-Milne was one of that select band of young men who made history in the air between 1915 and 1918 when they learned to fly in machines that resembled box-kites and laid the foundations of aerial combat which future generations would follow. He became a flying ace, with six confirmed aerial victories, and he spent two years as a prisoner of war before escaping from German captivity to fly and fight again. He took part in the great aerial...