Look of triumph in Dumbledore's eye

[Mike]

No: HPFGUIDX 155021

<bridge13219> wrote:
<snip>

> While Lily's sacrifice saved Harry
> immediately, the charm Dumbledore cast that night (by leaving him 
in
> the house where Lily's blood lives) has kept him safe all these
> years.  I think the "look of triumph" was because the charm 
>Dumbledore cast was/is working, and Voldemort is only aware of the 
>protection caused by Lily's sacrifice.
>
Mike here:
I think Voldy is aware that DD added some protection. He says in the 
graveyard, "Dumbledore invoked an ancient magic, to ensure the boy's 
protection as long as he is in his relations' care. Not even I can 
touch him there ..." (GoF p.637 US). So Voldy knows Harry has 
additional protection beyond Lily's sacrifice, but I don't think he 
knows the exact form that protection takes. DD tells us in OotP that 
it's built upon Lily's sacrifice with her blood, Petunia's blood, 
Harry's blood, and now *Voldemort's blood?* 

Could this be the reason for the gleam? I don't know, but Harry's 
protection from this "ancient magic" expires on his 17th birthday so 
I don't see how Voldy having the same blood can help Harry after 
that. And yet JKR hinted in her July 05 interview with 
Melissa/Emerson that the "gleam" is/was very important and still in 
play. ??? So how it plays out, still a mystery to me. If we keep 
throwing ideas at it, maybe it clicks for someone.

Mike, wondering how an expiring charm is still in play.