Was working on the ‘A’ section of № 4 yesterday. I’ve been listening to the Ockeghem Missa prolationum (at last, I might practically say: I know I’ve studied it any number of times in the past, but don’t know that I had ever actually listened to the piece as a whole) and it brought to mind that it is a while since I played rhythm-value games, hence the new vision for № 4. But (one of the hazards of working while commuting, I suppose) I found an error, and that I needed to audit the rhythm-values . . . which I managed to find on the homeward commute . . . so what happens on the bus, stays on the bus.