Snape joining Hogwarts

[James]

No: HPFGUIDX 96427


--- In HPforGrownups at yahoogroups.com, "Hitesh" <hiteshl at v...> wrote:
> In PoA (Page 261,Chapter 18, Bloomsbury Paperback) Lupin mentions
> Snape. Sirius interrupts him and says 
> 
> <Quote>
> 
> 'Snape?'..."What's Snape got to do with it?'
> 'He's here, Sirius,' said Lupin heavily. 'He's teaching here as 
well.'
> 
> <End quote>
> 
> Doesn't this exchange imply that Sirius did not know that Snape had
> ever become a Hogwarts teacher? Sirius went to Azkaban in early
> November 1981. So Snape would have become a Hogwarts professor only
> after Voldemort's downfall. I wonder why there is some controversy
> about whether Snape joined Hogwarts before or after the fall of 
Voldemort.
>
 
To assume Sirius would know who was currently teaching at his old 
school is a little far fetched. I don't know who is currently 
teaching in my old school.

As to Snape joining the staff, If he joined before riddle's downfall 
then I'd see it as that Snape changed side before Riddle was 
defeated. If however he joined after Riddles defeat it brigs into 
question, did Snape change sides or did he make a deal with 
Dumbledore when he was stuck in azkban.