Gone a while - question about Snape

[potioncat]

No: HPFGUIDX 154369

 
> Mhershey again:
> Ah, okay.  So at some point after Harry is born, Snape learns that 
> VD is after the Potters because of the info. Snape had given VD(and 
> we know from Canon that the Potters knew they were being targeted), 
> then, Snape goes to DD, says he feels bad about the whole thing, 
and 
> gets a job at Hogwarts.  In my mind, the whole "Snape 
> overhearing/Wormtail revealing/Potters dying" occurred in a span of 
> a few days, I overlooked the fact that Harry was not born at the 
> time the prophecy was made.  Thanks for clearing up what has 
> seriously confused me.


Potioncat:
That's one possible timeline.

Sometime after hearing the Prophecy, Snape came back to "our side" 
and began spying at great personal risk. We really don't know when 
that happened. A few people, (myself included) think he may 
have "come back" before he even took the Prophecy to LV.

My calculations (maths!!) has the Trelawney-DD interview around 
September of 79. DD's wording to Harry, although not conclusive, 
hints that he knew Snape was a DE at the time. So either he knew 
Snape would take the information to LV, but didn't stop him; or he 
discussed the delivery with a reformed Snape.