A short while ago I was researching some statistics on past Olympic Games and came across some information about the swimmer Johnny Weissmuller. The name was immediately familiar to me but from a quite different context. During my childhood, showings of his Tarzan films were regulars on Saturday morning television and even now I can picture him in his various adventures alongside co-stars including Maureen O'Sullivan, Brenda Joyce, Johnny Sheffield ("Boy") and "Cheeta" (which confusingly was a chimpanzee).