hi from OZ.
JonathonD can you recall what time of year this occurred as i am wondering if this person is protecting this patch from other people due to the presence of psilocbe cubensis or magic mushroom if this is the case then it would have happened in the autumn.
All the best.
Steve.
Just make sure you always have someone else with you Jonathan when you visit. Getting curiouser and curiouser with each post! Could you dig into the 'hollow ground' at all?
Get a metal detector down there - see if there 'owt stashed.
Tell Time Team that there is a Roman Villa there and let them Geophis the place!
Do you think that there is another forum somewhere, where some dude who likes pistachios is bitching about all these scary, wild bushcrafty looking men who keep coming past and ripping up his stash, pulling down his dens, and messing with his paddle fishing gear?