Spoiler for this week's show:
In the swamp, the stone road was declared to be designed to carry heavy loads by a historian. Ancient carts were a standard width of 5 feet - so the 6 foot wide stone path would be well suited for the ox carts to haul treasure from ships to the money pit and dump it in. The Templar cross carved into a large stone at Overton, NS is likely dated from the same era as the stone road. The finds are a round metal ring, possibly a cart wheel bearing or axle brace, and a hand forged rosehead spike - similar to the rosehead spike found in borehole C1. Also a wooden stake.
At lot 25, Gary finds a larger size copper coin, likely old. Also a fancy stick topper of some sort with a crown design.
At the money pit, they continue to work through the ancient tunnel via exploratory drilling shafts, possibly toward the real location of the money pit.