My mom just told me a story that came from her partner's brother, evidently a letterboxer! It led me to explore a bit about the "letterbox walks" on Ascension Island, in the Falklands. Anyone looking for an interesting and fairly exotic Lb vacation should check it out! I've been wasting time looking for clues, but haven't come across them yet. Here's an anecdotal link:

http://www.rafactivee25m.wanadoo.co.uk/e25ashes.html

Happy Boxing!

aT