Snape and Quirrell/Voldemort

[Olivia]

No: HPFGUIDX 44145

As always, apologies if this has been disucussed before. I'm still, still,
still making my way through the archives. They're inspiring and
thought-provoking and I should be finished in about three years.

But on with my question...

I was rewatching bits of Harry Potter and the Sorcerer's Stone, (This isn't
a movie question, I promise.) and something caught my attention that I
hadn't thought of before. Since Professor Quirrell actually had Voldemort
living inside of him, specifically kind of hanging off the back of his head,
didn't Voldemort hear everything Snape said to him? At the end of Sorcerer's
Stone Voldemort is hearing everything Harry says -- lying about what he sees
in the Mirror of Erised.

So, wouldn't Voldemort hear Snape threatening Quirrell? Doesn't that
incriminate Snape and endanger his double agent status? Voldemort hears
Snape bullying Quirrell around, threatening him about going after the
Sorcerer's Stone, wouldn't that get the Dark Lord a little angry that one of
his Death Eaters is standing in his way? Or does Snape have really good
timing and only catches Quirrell when Voldemort is off in the Forrest
swigging Unicorn blood? It's possible, but it seems unlikely.

Also, can some of this lead back to the end of Goblet of Fire when Voldemort
is going on about the Death Eater that went astray? I know the list has gone
back and forth over who that Death Eater could be, but if Voldemort heard
Snape verbally abusing Quirrell and trying to protect the stone from him,
when he clearly knew why Quirrell was after it, isn't it possible that
Voldemort considered him lost forever? Maybe that's what Snape's mission was
at the end of GoF.

Ah, I'm running out of steam. Time for me to get some sleep, but I'd love to
hear what people think. And if it has been discussed before, please, by all
means, point me in the right direction so I can sort this all out in my
mush-like head.

Olivia :)