Dumbledore: Patronus and Dementors (specifically Snape's)

[potioncat]

No: HPFGUIDX 173819

 
> Claire adds:
> 
> JK has resolved this question in the Bloomsbury webchat (isn't
> post-latest HP book easier, although perhaps less fun, when JKR
> is happy to answer any question without worrying about spoiling
> any future books?):
> 
> "jenny: How did snape keep his patronus secret from the rest of
> the order?
> 
> J.K. Rowling: He was careful not to use the talking Patronus means
> of communication with them. This was not difficult, as his
> particular job within the Order, ie, as spy, meant that sending
> a Patronus to any of them might have given away his true
> allegiance."


Potioncat:
That makes it canon, I guess. But I wonder if JKR meant that Snape 
didn't use the Patronus to communicate with the Order *after* he 
killed DD, or he had never used it? I also wonder if she intended 
this all along, or made it up afterwards.