"Wotcher, Harry!" Tonks' voice, bright- though perhaps not as bright as it had once been- issued from the Patronus, which actually wagged it's tail slightly for a moment. "It's Tonks. Well I suppose you know that, since you probably recognize my voice, but I figure I should mention, you know, just to be on the safe side. You can't fake a Patronus, by the way, if Hermione's with you I'm sure she could tell you that. But just in case she's not at the moment, let's see... Oh! The first time I saw you, I lured your family out of the house by sending them a letter informing them that they had been short-listed in the 'All-England Best Kept Suburban Lawn Competition'! Remember?" The dog paused for a second, and then continued, "I suppose you just answered, but I can't really know, unfortunately you can't communicate back and forth through a Patronus like that."