John's at Hurst Green, agreed and said he has played the organ at services where nobody at all sings and puts it down to people not being as familiar with hymns these days.
However, Harper's advice at the Kensington Oval prompted West Indies coach John Dyson to speak to match referee Alan Hurst during the final session of the day.
Other conference goers, many of whom are Gadgetoff regulars, also shone: including Amazon's Jeff Bezos, TED conference founder Richard Saul Wurman, computer engineer Danny Hillis, polymathic inventor Dean Kamen, sly literary agent John Brockman and Creative Good's Mark Hurst.
Hurst described Capello's decision to strip Chelsea's John Terry of the captaincy in the wake of allegations that he had an affair with the former partner of ex-team-mate Bridge as "just about right".