PS Not only did we not find the cache, we almost lost our handheld Garmin GPS here! We retraced our steps several times to search for it, and eventually found it lying on the ground beneath the van where it had dropped out. It's not a cheap piece of equipment, and was a recent replacement for the older one we (I) lost last year. John called in at a 'two-dollar shop' in town straight afterwards and bought a colourful dog lead so I could attach it to my camera bag.