Was Snape lurking in PoA or was he on his way to meet with Peter

[dumbledore11214]

No: HPFGUIDX 120563


 Vmonte writes earlier :
In PoA Harry sees Peter's name on the map and goes looking for him 
inside the school. Is it possible that Snape was on his way to
rendezvous with Peter but was accidentally caught by Harry?
  
Fridwulfa:
I'm sorry, but that's movie contamination. In the book Harry NEVER 
sees Peter's name on the map. Therefore he never goes looking for 
him in the middle of the night.
  
Alla:
 
The first part of Vmonte's post can be movie contamination, but can 
we be sure that Snape did not go to Shack to meet Peter? :)

Just to clarify -  I am also guilty of not reading the post 
carefully - somehow I assumed that rendezvous with Peter was to 
occur in the Shack and Harry caught him in the Shack.


My question still stands though.