CHAPTER 17 DISCUSSION, II - Floo and Fireplace

[snazzzybird]

No: HPFGUIDX 97676

--- In HPforGrownups at yahoogroups.com, "a_rude_mechanical" 
<a_rude_mechanical at y...> wrote:
<snip>
> At around midnight, the twins finally leave.  Harry puts away the
> essay, and whose head should pop into the fireplace but Sirius 
> Black's.  
<snip>
>Just then, he looks alarmed, turns and faces the wall, and then 
>vanishes.  In the fire a > hand appears, DeeJay's.  So she DID 
>intercept the owl!  As she gropes around, trying for Sirius' head, 
>the Three take off for the dorms.  
> 
> ~~Does DD's secret keeping then not extend to the Floo Network?  If
> DeeJay had indeed caught Sirius, would she have then found 
> Grimmauld Place?  I'm confused as to how exactly the Floo Network
> functions and don't understand how anyone could catch you just 
> by finding your head.~~

snazzzybird sez --

I wondered about that too.  Sirius was speaking from #12 Grimmauld 
Place, which was protected by the Fidelius Charm.  If Umbridge had 
gotten hold of his hair -- well, okay, he probably would have been 
able to get free. But what if he hadn't? If he had withdrawn his 
head from the fireplace with her hand still entangled in his hair, 
would she have been able to "trace the call" so to speak? Might she 
have popped out into the kitchen of Order of the Phoenix 
headquarters -- a location which does not exist for her, because she 
has not been told about it by the secret keeper?

If so, the Fidelius Charm might have rendered her confused, groggy;
Sirius could then have hustled her out to the front door and launched
her onto the street. Then as she wandered, in a confused state,
along the streets, the charm might gradually lift, leaving her
wondering "Where am I? How did I get here? Am I going mad?"
Perhaps St. Mungo's would have been the next stop for the radiant
Dolores.

--snazzzybird, who's fascinated with the whole fireplace 
communication and travel process