Someone who knows why DD trusted Snape?

[Michael McHenry]

No: HPFGUIDX 133930

cara_vzq  wrote:
> ...there is a part in the book that threw up a questions for me, over why Dumbledore trusted Snape....`I should think not,' said a snide voice; Phineas Nigellus was evidently only pretending to be asleep. Dumbledore ignored him. (P336, UK Edition)
> 
> Could this mean that Phineas knows the reason that Dumbledore trusts Snape? Phineas, who has before moved between his portrait at Hogwarts to Grimmaud Place, which Harry now owns, and will possibly be visiting in Book 7….

How safe it is for Harry to visit the Black home depends on what happened to the secret after Dumbledore's death.  Of course he'll have to go anyway.

I really think you're onto something, here.  It's important that Phineas was the one who said this.  I think you could weave a story of Regulus being tied to Snape's redemption and tie that into the theory of RAB being transfigured into Buckbeak for his own safety.
-mgm