Manipulation in Potterverse and in general /Tigana spoilers

[pippin_999]

No: HPFGUIDX 185156

-
> lizzyben:
> 
> DD could certainly guess. He's a Legimens! And no one mention's 
> Quirrell being any kind of great Occlumens. 

Pippin:
"He [Voldemort] did not dare reveal himself to a former ally if that
ally might turn him over to Dumbledore or the Ministry. I deeply
regret that he did not trust me. He would have returned to power three
years sooner. As it was, I saw only greedy and unworthy Quirrell
attempting to steal the stone and, I admit, I did all I could to
thwart him." -HBP ch 2

How Voldemort arranged that Snape could see only greedy and unworthy
Quirrell, canon does not say, but Bella finds no doubt that it's
possible. And if Snape can be thwarted so can Dumbledore. Bella knows
that Snape is a legilimens of course, since she puts Draco on his
guard against him. 

The "keep an eye on Quirrell" had to be there to clue us in that Snape
was/would be reporting on him to Dumbledore. There had been a lot of
debate about whether Dumbledore actually knew about Snape's suspicions
at all.  

I'm not doubting manipulative DD, he's as real as cowardly,
passive-aggressive Lupin. But to have set up the  protections  when
the school year starts, before the Trio have become friends, and
before anyone has a chance to discover their skills, he would have to
be not only manipulative but omniscient, clairvoyant and prescient as
well. 

The most solid clue that he might have done it, IMO, was the three
broomsticks in the Keys Room. But now that we know about the RoR, it
seems more likely that the Keys Room simply conjured enough
broomsticks for the number of visitors present.

Pippin