Harley took the note and read it carefully. "The headquarters of the Order of the Phoenix is located at Number 12 Grimmauld Place, London."
She froze instinctively. Wasn't that the location of Number 12 Grimmauld Place? The Order of the Phoenix's headquarters was there?
Wait, why had Professor Dumbledore given her this note...
Harley rubbed her temples unconsciously, suddenly recalling something.
Professor Dumbledore had once revealed while talking with Grindelwald that, to ensure its safety, the Order of the Phoenix had been placed under the Fidelius Charm, with Dumbledore himself as the Secret Keeper.
No wonder that, before she participated in the International Wizarding Tournament, she had suddenly felt an inexplicable force trying to invade her memories.
That force had been far too subtle and not particularly powerful. It had also bypassed Occlumency, which did not fit the usual workings of memory magic.
So Harley had assumed at the time that the Manipulation Glasses, a magical item with a degree of sentience, had suddenly gone haywire and was inflicting emotional side effects on her.
After inspecting it, Harley had found no major abnormalities with the magical item.
So she had merely used the status and power of Sequence 2 to erase that force, then put the matter out of her mind.
Thinking back on it now, that had probably been the Fidelius Charm at work, trying to conceal the location of the Order of the Phoenix within her mind.
"Come on. I think you've realized the true nature of this charm as well."
Professor Dumbledore rose from his chair and casually pulled out a book.
"For safety's sake, the Order of the Phoenix is protected by the Fidelius Charm, the Anti-Disapparition Jinx, and the Anti-Portkey Jinx. Only this specially made Portkey and Fawkes's Apparition can reach it directly. Even most