Now this one was really difficult. I got through the first couple of stages but then hit a brick wall. I couldn't see what to do at all.
Then six months later I came across my old print-out and had another look. Something about the puzzle had been nagging at me all that time, and suddenly I realised what it was. I tried something out and to my surprise it worked - it really was child's play.
This was fourth of the day. A quick find but we nearly got muggled - a big dalmation bounded up to us as I was signing the log.
Some great trees around here.