Sirius / Peter - spying and Snape

[Simon J. Branford]

No: HPFGUIDX 5667

Blaise wrote: "But more importantly, there is absolutely no reason for Snape
to disbelieve the theory that Sirius was working for Voldemort.  It is his
great triumph over Sirius that Sirius, whom he detests so strongly, should
turn out to be the real traitor, and Snape who temporarily worked for
Voldemort should be the 'good guy.'  He is not going to believe that just
because he hasn't seen Sirius with Voldemort, that therefore Sirius is not
working for Voldemort.  Naturally, he will assume that Sirius is keeping his
identity well hidden.  Snape believes that Sirius was a Death Eater because
it makes him feel superior to Sirius, and because he sees no reason to
disbelieve it."

Maybe Snape did know about Peter being a spy, but there is no reason for him
to assume that Peter was the only spy. Snape could just have assumed that
James Potter had some bad luck picking friends - two spying for Voldemort
and one werewolf.
Hagrid makes comments about having to be careful - not knowing who to
trust - making sure you did not say too much in front of a stranger.

Simon