As far as I can tell, the likeliest (i.e., simplest IMO) in-world hypothesis is that Azkhaban already has lots of wards on it, and one of the “standard” ones was not necessary because of that.
ConservationOfDetail suggests that’s not the case, but I don’t quite see how we can deduce what you’re trying to do, especially keeping in mind that authors can do the same deductions we do and like to twist things by just picking a less-likely hypothesis and explain it after the fact (or just make the dice fall that way).
Oh, you’re right. I got confused about which chapter we were discussing, sorry about that.
That said, something similar applies here: Quirell did 29 charms in Mary’s room, and 30 outside of it. A very simple hypothesis would be that the 30th was something already “implemented” in Mary’s room. (In fact, given that Mary’s room is described as particularly safe even before the charms, the surprising thing is he didn’t do significantly more than 30 charms outside it. The uniqueness of Mary’s room suggests that it would be hard to duplicate it, but it seems strange that nothing could be done to at least approximate it.)
As far as I can tell, the likeliest (i.e., simplest IMO) in-world hypothesis is that Azkhaban already has lots of wards on it, and one of the “standard” ones was not necessary because of that.
ConservationOfDetail suggests that’s not the case, but I don’t quite see how we can deduce what you’re trying to do, especially keeping in mind that authors can do the same deductions we do and like to twist things by just picking a less-likely hypothesis and explain it after the fact (or just make the dice fall that way).
They’re not in Azkaban at the time; this is the discussion in Mary’s Room.
Oh, you’re right. I got confused about which chapter we were discussing, sorry about that.
That said, something similar applies here: Quirell did 29 charms in Mary’s room, and 30 outside of it. A very simple hypothesis would be that the 30th was something already “implemented” in Mary’s room. (In fact, given that Mary’s room is described as particularly safe even before the charms, the surprising thing is he didn’t do significantly more than 30 charms outside it. The uniqueness of Mary’s room suggests that it would be hard to duplicate it, but it seems strange that nothing could be done to at least approximate it.)
But didn’t he do all 30 charms on a previous visit to Mary’s room?
There are too many chapters now for me to track this down easily.