"'Good, then, is indefinable,'" he read out. "How jolly to think that's going on still! 'So far as I know there is only one ethical writer, Professor Henry Sidgwick, who has clearly recognised and stated this fact.' That's just the kind of thing we used to talk about when we were boys. I can remember arguing until five in the morning with Duffy--now Secretary for India--pacing round and round those cloisters until we decided it was too late to go to bed, and we went for a ride instead. Whether we ever came to any conclusion--that's another matter.