Roald Dahl on 13 September is celebrated as "Roald Dahl Day" in Africa, the United Kingdom and Latin America. In honour of Dahl, the Royal Gibraltar Post Office issued a set of four stamps in 2010 featuring Quentin Blake's original illustrations for four of the children's books written by Dahl during his long career; "The BFG", "The Twits", "Charlie and the Chocolate Factory", and "Matilda". A set of six stamps was issued by Royal Mail in 2012, featuring Blake's illustrations for "Charlie and the Chocolate Factory", "The Twits", "The Witches", "Matilda", "Fantastic Mr Fox", and "James and the Giant Peach". Dahl's influence
Roald Dahl Fleming (who later published the popular "James Bond" series) and David Ogilvy, promoting Britain's interests and message in the US and combating the "America First" movement. This work introduced Dahl to espionage and the activities of the Canadian spymaster William Stephenson, known by the codename "Intrepid". During the war, Dahl supplied intelligence from Washington to Prime Minister Winston Churchill. As Dahl later said: "My job was to try to help Winston to get on with FDR, and tell Winston what was in the old boy's mind." Dahl also supplied intelligence to Stephenson and his organisation, known as British Security Coordination,