Timeline Questions re Snape's and Trewlaney's Appointments

[finwitch]

No: HPFGUIDX 150927

--- In HPforGrownups at yahoogroups.com, "gelite67" <gelite67 at ...> wrote:
>
> In OOP, Harry turns 15; Trewlawney said she'd been teaching for 16 
> years; and Snape said he'd been teaching for 14 years.
> 
> So, Trewlawney started teaching the year before Harry was born?  
And 
> Snape the year after?  

Finwitch:

That would seem plausible. The prophecy that got her the position did 
refer to the one who will be born - Harry - so I'd say it WAS before 
Harry's birth.

As for Snape coming to teach the year after -- yes, after that trial, 
I'd say, where Dumbledore vouched for him. I guess that Slughorn 
retired after Longbottoms were tortured, thus leaving a place open 
for Snape...

Finwitch