I had a lovely splurge of Wagner the other day. I watched an orchestra playing an arrangement of the highlights (best bits) from The Ring of the Nibelung. It started in the Rhine (‘in it!’, as Anna Russell emphasised). This is a long, long crescendo in E flat major that starts deep in the orchestra. I wondered whether the Rhine would change colour from E flat major to E major as flowed from the deep ever more strongly. I can happily report that it did not. The Rhine is fine.

The Valkyries still ride in B minor, I am happy to report.

The Rainbow Bridge over which the Gods make their harp-filled entrance into Valhalla was rather wobbly between G flat major and G major. I could shift what I was hearing between the two keys at will. I feared for the Gods’ future.