Days later, a message arrived from a username he didn’t recognize. The message was plain: “I was there. We recorded Zig Zag in ‘92. It was a workshop piece. The cassette run was five copies. You found our extra take. We appreciate you listening. Please treat it like a handshake.” The sender attached a photograph: a battered boombox, a cassette labeled by hand, and three faces smiling into the camera. The handwriting on the cassette read Zig Zag 1 — extra quality.