Good question Ian! I'm going to have a go at answering.
"Wallplanner", from the English "wall-planner" meaning "wall planner" derived from the Latin "wallus plannus". This popular Victorian passtime provided an excellent opportunity for victorians to travel around, usually "by cycle" (later to become known as "bicycle") generally planning walls and stuff. Hence the sport of bicycling was born, later to be known as cycling. The pass time became less popular following a rather excessively enthusiastic russian cycling group who following a trip to eastern germany established a Berlin based wall planning group who created a highly controversial and ultimately divisive exhibition piece in the early 1950's. This now minority hobby is usually limited to private dwelling places and some offices and usually involves checking internal walls for any plans for cycling or "by cycling" for those of a more traditional orientation. I hope this helps? Any questions, Wikipedia is a great source, as well as the Museum of Wall Planning
Andy