A curious case of "amnesia" from 1953:
Police were never able to trace North's movements from New Zealand to London, but "amnesia" was accepted as the solution to the mystery. (Even though North had never before suffered from memory loss and the poor befuddled man had no idea why he should want to leave his "normal environment.") It all sounds very tidy and straightforward, if highly unusual, but Harold T. Wilkins, who mentioned the incident in his book "Mysteries Solved and Unsolved," made an excellent point: "Who paid the not inconsiderable airliner passage to London from New Zealand; since it seems very unlikely that a schoolmaster, on the way to school in New Zealand, with no thought of going beyond his school, would have been carrying in his pocket wallet the fairly large sum for a trip he had not planned to take?"
As far as I can tell, no answer to that question--or the riddle of why it had proved impossible to determine where and how he traveled to London--was ever found.