Things that will come into play later.

[Geoff Bannister]

No: HPFGUIDX 79674

--- In HPforGrownups at yahoogroups.com, <silverdragon at e...> wrote:
> 
> >   I've been wondering how a patronus works.  The patronus comes 
at the
> dementor once, and they go away and don't fight or try to come back.
> Patronus' must be VERY powerful.  Does it even matter what animal 
it is or
> how big it is?  I'm sure even Harry's stag looks small to 100 
dementors.
> >
> >   Joj
> 


Nox:
> Does anyone actually know what becomes of a dementor once it has 
been
> charged by a patronus? Is it destroyed? Can it return? Is it 
immaterial as
> there are so many of them and a constantly new supply? Does it just
> dissapear and end up somewhere else (think Tartaru or somewhere)?
> 
> Just a question.


Geoff:
I think they just go away. Canon.....

POA p.282 UK Bloomsbury edition..
"Something was driving the Dementors back....it was circling round 
him and Sirius and Hermione....the rattling, sucking sounds of the 
Dementors were fading. They were leaving..the air was warm again...."

and the same scene later (p.300)
"It wasgalloping sliently away from him, across the black surface of 
the lake. He saw it lower its head and charge at the swarming 
Dementors.... now it was galloping around and around the black shapes 
on the ground and the Dementors were falling back, scattering, 
retreating into the darkness...they were gone."
>