The Grand Tour: Letters from the British Empire Expedition 1922Unpublished for 90 years, Agatha Christies extensive and evocative letters from her year long round the world trip to South Africa, Australia, New Zealand, Canada and America as part of the British trade mission for the famous 1924 Empire Exhibition. In 1922 Agatha Christie set sail on a 10 month voyage around the British Empire with her husband as part of a trade mission to promote the forthcoming British Empire Exhibition. Leaving her two year old