Marauders Map and Unplottable Chambers

[erisedstraeh2002]

No: HPFGUIDX 43903

UNcmark wrote:

> I'm sure it's been asked before, but what would Fred and George 
> have found if they had used the Marauder's Map to look in the 3rd 
> Floor Corridor in Book 1 or searched for the Chamber of Secrets in 
> Book 2?

Now me:

A most intriguing question!  And one I had not thought of before.  I 
think the answer is that the Marauders made the Map, so the Map only 
shows the rooms/chambers/passageways that the Marauders found during 
their explorations of Hogwarts.  With regard to the 3rd floor 
corridor in PS/SS, I don't have the impression that new 
rooms/chambers were built to guard the Stone; I thought that the 
different obstacles were placed in existing rooms.  And my impression 
of the Map is that it shows people and locations, not objects or 
animals.  Although the chessmen came alive, but perhaps F&G weren't 
looking at the Map during Quirrellmort's attempts to get to the Stone 
(which would explain why they didn't see Quirrell show up as a dot 
there).  Or perhaps, since the chessmen were not really "human" (at 
least, I didn't think they were!) they wouldn't show up.

With regard to the Chamber of Secrets, as Professor Binns 
says, "...the school has been searched for evidence of such a 
chamber, many times, by the most learned witches and wizards" (CoS 
Ch. 9, UK ed., p. 115).  So the Marauders probably didn't find it, 
either, and therefore it wasn't placed on the Map (I suspect that 
James, Sirius and Remus would have tried to kill the Basilisk 
themselves if they had been able to find the Chamber).

UNcmark again:
> What would F & G have seen in SorSt if they had looked in 
> Querrill's room? Would the map have named Voldemort?

Me again:

Ooooh, another good question!  Perhaps Voldemort didn't show up 
because he didn't have a body of his own?

~Phyllis