Plot Oversight in PS/SS?

[Derek Hiemforth]

No: HPFGUIDX 138867

--- In HPforGrownups at yahoogroups.com, "Geoff Bannister"
<gbannister10 at t...> wrote:
> Because, in my own view at least, I don't see the Mirror as being 
> part of the protections around the Philsopher's Stone. You don't
> have to get past the Mirror in order to reach the dungeon.

Derek:
So prior to the Mirror's relocation to the dungeon, what were all
the elaborate protections guarding?  Nothing?

In other words, if Quirrell had somehow managed to use his troll
diversion successfully at Halloween, and had gotten past the
protections then instead of later in the school year, the Stone
just wouldn't have been there?