marks for resourcefulness to son M and his Russian girlfriend L. In the dark of night on Sunday night, they searched South Africa's (arguably) only castle moat for treasure, dragging a magnet through it. They found several coins, until ... Castles may be defended by more than mere moats. This one is a working army base. A soldier cut their operation short. They can count themselves lucky that they aren't in the castle dungeon. The soldier decided that they were just loons.