"Come to my office this evening, at six. I have devised a new regime of care for your wound that I must discuss with you," for the first time, possibly ever, Harry gained the distinct impression that the disdainful way in which Snape addressed him was an act to disguise his true feelings. Snape might have been more accomplished in occlumency than possibly any other wizard in Britain, but Harry had had enough years of experience of being sneered at for him to recognise when the potion master’s heart wasn’t quite in it.