Is that a dragon I see, riding the air-currents, getting ready to open its mouth and burn Dumbles' credibility to a crisp? (His PUBLIC credibility/reputation, that is; his credibility/reputation with Harry and most of the Wizengamot is already roasted.) Percy stops by #12 (with his Penelope); and earlier, Hermione apologizes (to Harry) and gets gently called on the carpet about Wizarding Tradition (also by Harry). And we should also have the answer to the Sixty-Four-Galleon Question as to what that voice in Harry's Head is coming from - his House Potter Ring. (The Voice itself gave the jig up by saying that it has been advising Potters since the 1100s. That is eight centuries, folks; given how long some families in Magical Britain keep other things, what would be MOST likely, other than weapons, to withstand the test of time and be held by magical nobility?) Also, Rings of Nobility (the heraldric term - it's not magical OR muggle) can also be used to affix seals to documents; yes, it's more tradition. That use is straight out of known history (specifically, European history), as this was the case for nobility throughout Europe.