When I put together my book Rock Shrines, about places music fans go to pay tribute to their dead heroes, I was particularly struck by the story of Ben Cauley. He was trumpet player in Otis Redding's band, The Bar Kays, and the only person to be pulled alive from the freezing waters of Lake Monona, Wisconsin, after the light aircraft crash that killed Redding and the rest of the band in December 1967.