Ultimately, the tapes are legible. And, once your ear adjusts to the situation, email datasets wonderfully personal. These are workers, craftspeople, artists, taking time out from their day to share their current worries, considerations and plans. They speak, not so much as a performer providing entertainment at a microphone for a “personal moment” during a concert or appearance, but people with a job sharing how they got there, and where they are going.

With Happy Days now in its third season, Winkler has been given co-starring status in the series with Ron Howard. Fonz-mania, years away from famously “jumping the shark”, has him in stadiums with 25,000 people cheering for him. Under any measurement, he is experiencing super-stardom, with the sky the limit.