Phineas Nigellus's portrait inside it overheard Hermione and reported that to Snape. Snape thus knows that Harry and Hermione are in the Forest of Dean, though not exactly where; the Forest of Dean is a largish place, several wooded sections totaling about 40 square miles.
Phineas overheard Hermione talking about their location in the Forest of Dean because Hermione forgot to close her enchanted beaded bag. Phineas then reported the location information to Snape in the Headmaster's office.
It was during their stay in the forest that Severus Snape anonymously delivered the Sword of Gryffindor to Harry by placing it inside the frozen lake that resides in the forest and using his Patronus, a doe, to guide him to it.
However it seems that Dumbledore eventually disclosed the cloak to Snape and possibly other teachers, as Snape knew Harry was in possession of the cloak in Prisoner of Azkaban, when Malfoy reported the apparent apparition of Harry's floating head outside the Shrieking Shack, which Snape immediately understood to be ...
Yet despite the danger of his mission, and despite being hated by most of the wizarding world, Snape held on to the one thing that kept him going: the safety of Lily's son. He even sent his Patronus to guide Harry Potter to the sword of Gryffindor (a known Horcrux-killer) in a nearby lake.
Draco's refusal to reveal Harry's identity to Bellatrix was not because he liked him. It was because he believed that Harry was the only chance they had at defeating Voldemort. At first, Draco admired and revered Voldemort until he threatened his family's safety.
Question number one: Why didn't Dumbledore just give the sword of Gryffindor to Harry instead of leaving it to him in his will? He knew even before his death that Harry would need the sword to destroy Horcruxes, and he must have known that the Ministry would not let Harry get the sword.
Additionally, in Harry Potter and the Chamber of Secrets, Professor Dumbledore looks right at Harry and Ron underneath the Invisibility Cloak while in Hagrid's hut, suggesting that Dumbledore might actually be able to see through the Invisibility Cloak.
He doesn't trust Snape as Dumbledore does, but he believes that he can detect any disloyalty. Moreover, Voldemort regards Snape as highly intelligent and therefore ' as a true Slytherin ' a person whose top priority is to take care of himself. To his twisted mind, selfless equals stupid.
In a chat with fans on the-leaky-cauldron.org, J. K. Rowling answered a fan's question of why Albus Dumbledore was sometimes able to see Harry under the Cloak of Invisibility, explaining that he used the Human-presence-revealing spell with non-verbal magic.
Snape uses his doe Patronus to show Dumbledore that he never fell out of love with Lily, his childhood best friend. Warner Bros.
Harry sees Snape and McGonagall talking in the forest.
Phineas Nigellus's portrait inside it overheard Hermione and reported that to Snape. Snape thus knows that Harry and Hermione are in the Forest of Dean, though not exactly where; the Forest of Dean is a largish place, several wooded sections totaling about 40 square miles.
Snape tells Voldemort that Harry Potter is to be moved from his place of safety on the next Saturday at nightfall.
She knew Snape was working for the Order - everyone in it did. Professor McGonagall knew that Snape was working with Dumbledore. Everyone in the Order did, which is why Snape was actually let into Order meetings - if they didn't know, they'd likely have tried to not let him it.
Though Harry encountered many opportunities that deemed Avada Kedavra necessary, it remains as one of the Unforgivable Curses Harry Potter never cast. For one, he viewed the spell as an immoral practice commonly used by users of the Dark Arts.
Although Snape may not have projected his memory of James onto Harry, he still would have been predisposed to dislike him by virtue of him being James Potter's son. Harry being in Slytherin would not have changed this fact.
Erroneously believing Snape is the master of the Elder Wand and that Snape's death will make him the master of the Wand, Voldemort kills Snape by having his pet snake Nagini bite him through the neck.
Dumbledore knew Harry and Ron were under the invisibility cloak at Hagrid's hut in Harry Potter and the Chamber of Secrets, as his eyes flickered in their direction.
In Rowling's Harry Potter series, Dumbledore demonstrated the ability to possess wandless magic on several occasions, most memorably when he cast Aresto Momentum without a wand to save Harry from falling to his death during a Quidditch match.
He was sure there were Horcruxes after laying a eye on the diary (or at least started to think Voldemort might have them). What we, however, do know is that by the time book 4 came along, Dumbledore knew that Voldemort had Horcruxes and he also knew Harry would have had to die - expect this had changed.
Dumbledore and Grindelwald took a blood oath to not fight each other.
He finds out for sure immediately after Nagini's attack on Arthur Weasley. This night is significant in many ways. While Harry sleeps, he enters Nagini's mind.
It obviously wasn't of any use to him as Dumbledore's agent to give Bellatrix any sword (fake or not); so he must have done it as part of his Death Eater disguise. At that time, the Death Eaters didn't know that the sword was instrumental to destroying Horcruxes (or that anyone was after them at all).