Further questions on PoA Post DH look

[Jayne]

No: HPFGUIDX 181566

I have a couple of questions.

When Harry was exploring the corridor at night with the Map
and Snape discovered him, why did Snape call for Lupin to
come by floo. Was it because Lupin was DaDA teacher or did
Snape know what the map was and that Lupin had been involved
in writing it?

My next question sort of relates to the one I asked a while
ago about Snape knowing prior to end of GoF that Sirius was
an Animagus.  What did Snape hear?

IMHO Snape got to the Shrieking Shack a while before he made
himself known and heard Lupin tell Harry and Co about James,
Sirius and Peter.  In the book we are told that there was a
creaking outside the door, but nothing was there. I feel that
was Snape under the Invisibility Cloak.


Jayne