Snape Timeline....

[Bart Lidofsky]

No: HPFGUIDX 188595

Bart:
    There's been talk about Snape and his role in the VW I (Voldemort 
War I). Here's what I gathered: From the Prophecy, it is not clear 
exactly when it was made. The way I see it "The one with the power to 
vanquish the Dark Lord approaches... Born as the seventh month dies... " 
seems to imply that Harry was either just about to be born or had been 
recently born when it was made. Certainly, if Snape did not know of 
Harry's existence, that would explain why he didn't realize that Morty 
would go after Harry. Other evidence, including testimony that Snape 
spent some time as a spy for OOP Mark 1, implies that there was some 
time between Snape defecting and the Potter murders.

    I would like to posit that Snape spent from 6 months to a year as a 
spy for OOP Mark 1 before Voldemort fell.

    Secondarily, there has been an assumption that nobody knows about 
Snape's heroism in VW II. Can anybody give me a reason why Harry 
wouldn't have revealed that Snape was a hero? He didn't have the give 
the motive, even if he wanted to preserve Snape's privacy (he made no 
promise to do so).

    Bart