The team meets by video conference with geophysicist Jeremy Church, who has used new software to re-evaluate the 2018 seismic surveys of the eastern drumlin. The original data revealed a possible chamber, but the updated analysis shows something more: a tunnel running from Shaft 12 past C1 and leading to a 12-by-12-foot chamber at approximately 160 feet deep. Jeremy displays the Money Pit in color, with the highest points shown as pinks and reds, the lowest as green, and the middle range as orange. He identifies a linear feature he believes is a tunnel originating at Shaft 12. The shaft was dug in 1894 by Frederick Blair and his team, thirty feet east of the Money Pit and fifty-five feet deep, in an attempt to intercept the flood tunnel, but the plan failed and the shaft was abandoned. The tunnel Jeremy has identified sits not quite one hundred feet deep, in the same area where the team found traces of gold and silver in the water. Rick tells the team to put boreholes in the Shaft 12 zone.
In the swamp, Gary Drayton and David Fornetti search for clues while Billy Gerhardt digs at the southern edge, an area where numerous pieces of possible ship components have been found dating as far back as 660 A.D. Gary retrieves what appears to be a stake possibly used for marking the stone road, and David takes it to the research center for evaluation. Billy notes the area feels deeper, as if it were once open and someone closed it in. He then exposes a flat piece of wood that appears to be decking. In the War Room, Steve Guptill reports the piece was found twenty feet northwest of where a ship's railing was recovered the previous year. Craig announces the carbon dates: 1516 to 1674, consistent with the many 16th and 17th-century items recovered from the swamp.
On Lot 32, Marty and Gary search for more artifacts like the iron wharf pin and ancient bag seal found there the previous year. They recover an ox shoe similar to those found along the stone path, followed by a spike larger than railroad gauge that Gary suspects is an old wharf pin. At Northville Farm, Alex Lagina, Jack Begley, and Marty bring the spike to Carmen Legge. Carmen identifies it as a rock stake with a mushroomed head from repeated use, noting it would have been used to anchor a ship or drag cargo ashore. He dates it to 1710 to 1740, a range that aligns with the 1746 French ship's log Doug Crowell found in 2019, which describes a deep pit being dug and treasure buried during a mission to retake Acadia.
Rick, Marty, and part of the team arrive at the Money Pit for the drilling of Borehole AB13, targeting the tunnel Jeremy Church identified at ninety-five feet. Steve explains that based on Jeremy's coordinates, AB13 was chosen as the point most likely to intercept it. Craig wants the borehole drilled to 160 feet to get below the tunnel depth. At 68 feet the drill suddenly drops and water erupts from the hole. Brennan McMahon and Mike Tedford from Choice Sonic Drilling report they have hit a void measuring seven feet deep, and a safety inspection is conducted to rule out natural gas. Once cleared, drilling continues to 88 feet, where air begins escaping from outside the casing. The next day Rick and Marty return, and Terry Matheson explains that the cavity is not glacial and must be manmade. Steve suggests moving three feet down the seismic line for the next borehole, but Rick prefers two and a half feet, and the team shifts west accordingly.
