Thanks to all who are helping to decipher these extraordinary signs. Maybe some pictures from our walk on the path in question will help?
The pictures include another sign that confused us for a while - sign designers please note that decimal numbers do not work well when written vertically in this fashion. Exile #3 pricking her finger on a teasel (but not, happily, falling asleep for 100 years), E5N1 carrying the path along the path and some rather sad traffic cones which, when we first saw them back in March, were featured over at the wonderful world of funkypancake.
Would anyone like to make some serious suggestions about the signs in amongst the excellent joking around? I have the official answers ready!