Checking old documentation
Mark started to go through all the paperwork and documents related to the house. Five years after moving, the records stashed away could contain important information about the former owner of the home. He searched through the papers, trying to find the name and contact details of the person who sold them the home.

This person may know something about the mysterious object that was buried in a backyard. It was a long shot. This was a risky gamble, which would be based on serendipity. Mark felt compelled to investigate all possibilities, given the peculiarity of the situation. Who knows? Who knows?