A chance discovery six years ago by diver Doug Monk has turned into an underwater forensic mystery to identify the history behind a 1,400 pound iron anchor discovered in the depths of Puget Sound.

Join public historian Scott Grimm as he lays out the case claiming this is indeed the 222-year-old Chatham anchor and explores the challenges of authentication and preservation of historic artifacts.

The anchor will be on display at MOHAI July 8 - 11th.