who conjures the prongs patronus

[Jonathan Pessin]

No: HPFGUIDX 53316

drtruman writes

"Well, if Harry's thoughts are confused, so are mine. In the first 
excerpt, JKR seems to make it clear that Harry's Patronus has failed. 
But then, after he's conjured the stag Patronus to (apparently) save 
himself, Harry says he did it before. When? Did he do it before to 
escape from the dementors (as "Harry #1"), or did he do it before 
from the other bank of the lake (as "Harry #2")? Yikes!"

I think there are 2 possibilities for the "did it before" patronus. 
The first is that, if I remember right, Harry does actually conjure a
powerful patronus at the 2nd Quidditch match (the one where Draco and
henchmen try to scare him off his broom).  Again, I don't have my book
on me (more's the pity) but I seem to remember that this patronus is
indeed cohesive and powerful; powerful enough to scare Draco out of his
wits, at any rate.

The other possibility is that, as Harry realizes that he HIMSELF saved
his earlier self, he also realizes that, as he still exists, he must be
able to conjure the proper patronus, to save himself.  If he WASN'T able
to conjure a good patronus, he wouldn't be around in order TO conjure
the patronus.  (wow, my head hurts!)  

Hobbit-guy, realizing why he hates time-travel.