Pre disassembly, the large central stone is held up by three smaller chock stones . And a quartz pebble is secreted away below this large stone.Negative image where chock stones and quartz pebble removedFilled by plaster of paris and bandaging.Reverse of dried plaster of paris following being lifted. The attached sand will be removed gradually and a mould will be made to allow the nest of stones to be reassembled off site. Check back for updates.