Apropos of Birtwistle's Punch and Judy and its libretto, Gordon Crosse, in Tempo 85, submits that “an opera is a fusion of word, music and action in which, perhaps, only the music can bear separate scrutiny. W. H. Auden once described librettos as ‘private letters to the composers', and so they are”. On reflection and inspection, Gordon Crosse is much righter than Auden; as a matter of fact, he could hardly be righter. I'll take up the ‘hardly’ a little further down; for the moment, I want to rejoice that somebody has, at long last, said it. Crosse's may sound a slightly commonplace statement once it's out, but that is true of many propositions which hit the truth right at the centre.