We’ve come along way with this investigation. Today we focus on the owner of the Reel-To-Reel recorder, Ken Cooper, as we go from barely knowing anything about him, to discovering a great deal. Hopefully there’ll be a final part, in which we get to chat with some of the people who were on this recording, made 55 years ago, but for now, here’s the penultimate instalment of our reel-to-reel based mystery.