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 despair", and feeling guilty about not having been able to do anything for her. Dahl subsequently became a proponent of immunisation and dedicated his 1982 book "The BFG" to his daughter. After Olivia's death and a meeting with a Church official, Dahl came to view Christianity as a sham. While mourning her loss, he had sought spiritual guidance from Geoffrey Fisher, the former Archbishop of Canterbury. He was dismayed by Fisher telling him that, although Olivia was in Paradise, her beloved dog Rowley would never join her there. Dahl recalled years later: “I wanted to ask him how he could