In 1922 Agatha Christie Set Sail On A 10-month Voyage Around The British Empire As Part Of A Trade Mission To Promote The Forthcoming British Empire Exhibition. Leaving Their Two-year-old Daughter Behind With Agatha's Sister, Agatha And Her Husband Set Sail At The End Of January And Did Not Return Until December. Setting Off -- South Africa -- Australia -- New Zealand -- Honolulu -- Canada -- Journey Home. Agatha Christie ; Edited By Mathew Prichard.