Silent/Wandless Magic? (was Re: Has Trelawney Done Anything Magical?)

[Brenda]

No: HPFGUIDX 101524

>>> Lee wrote: ... as I recall seeing some wizards do magic without 
need of a want, i.e. snapping fingers and tying someone up, as I 
think it happened in SS/PS when Harry was tied up by Quirrell. <<<

Bren now:

I had been wondering about that for a while now.  Can a wizard 
perform magic without saying incantation outloud, or better yet, 
without a wand?  In PoA, during Harry's first encounter with 
Dementors, Lupin seemed to do magic without saying incantation loudly.

"There was a soft, crackling noise and a shivering light filled the 
compartment.  Professor Lupin appeared to be holding a handful of 
fames" (PoA, 65. UK)

Of course, this can also be explained the same way HErmione casts her 
specialty fire; she didn't seem to have said it outloud, though can't 
remember where I got the idea from.

"... And he said, 'None of us is hiding Sirius Black under our 
cloaks. Go.' But the Dementor didn't moce, so Lupin muttered 
something, and a silvery thing shot out of his wand at it..." (PoA, 
67. UK)

This interests me a bit.  Lupin insists that he's "not an expert at 
fighting the dementors, quite the contrary..." but we know from 
HArry's experience with Dementors, one needs to heavily concentrate 
on a happy memory and cast the spell with full force, outloud 
(Harry "bellowed" in PoA).  And I'm assuming that HArry's ability to 
produce a Patronous is quite superb, on the same level as other grown-
up masters of well-advanced magic.  Then how could Lupin 
just "muttered" the Patronus Charm?  Unless he's had many training 
with Dementors (or it comes with the nature of werewolves?)

This could very well be another movie-contamination (I think it is 
actually, can't find the canon in the books), but all those times 
Lupin opened the trunk and whatnot with hand - how does *that* work?  
Dumbledore does it too (again in the movies, not sure about the books 
though) with "changing the decoration" in PS/SS and candlelight on-
and-off in PoA.

Not to mention the powerful magical abilities of House-Elves.

Brenda, who realizes she might be expecting posts that say "it only 
happened in the movie, not in the books"...