Case of the Rusty Sword

Zack and Jillian are making plans to build their dream home, and to get started the old farmhouse where they've been living is being razed. Things get a little complicated when the first bulldozer cut reveals a secret chamber under the existing house. What is the previously unknown space doing on his property, how long has it been there, and who arranged to hide it in that particular foundation?

And-most mysteriously-how did a Civil War era sword and other old artifacts get there? From the m...