K-K
My letterbox stamp is a seahorse. I would have liked to use it for geocaching but apparently the name was already in use.
Further to this forum, I did not intend to start all the hassle about letterboxing v. geocaching, I too, think the two activities can run in paralell. My original statement about the origin of the sport came from something I read many years ago (on the letterboxing website, I think). It was written by someone who had started a "letterboxing" type of activity in a small area of the USA, around his home town. He claimed that he had first got the idea whilst on a trip to Dartmoor duing a visit to the UK. I assumed it all took off from that and subsequently spread through the world including the UK.