Does LV know Snape is at Hogwarts?

[Miller, Gina (JIS)]

No: HPFGUIDX 96025

strongbad wrote:
> *Voldy (in Quirrel) was at Hogwarts with Snape (not too 
> quick are you DD?).  He heard Snape threaten Quirrel about 
> the stone.  LV knows Snape is a traitor, right?  
> 
> So Snape is the death eater who "one is a traitor, and 
> certainly will die"-LV in GoF.  Right?


Gina reply: 
No, I thought of this too, but this is what I came up with....
Snape only asked him where his loyalties lie - so that could have meant
either side, but possession would not have been constant would it? When
Ginny was possessed she only said there were times when she would not
remember what she had been doing but was fine the rest of the time. Quirrel
probably had no idea what Snape was speaking of.

I think the "One is a traitor" is Karkaroff and the (sorry, no
book here, bear with me) "one that may never Return to him" is Snape. 

Gina