How did Regulus know that the locket was a Horcrux?

Regulus died trying to quench his thirst from the lake, and got dragged down under by the Infiri. tl;dr: Regulus knew the locket was the horcrux because the Dark Lord used Kreacher to test out the horcruxes defences, and Regulus was Kreacher’s master.

What’s Sirius Black Patronus?

Molly has been known to conjure a non-corporeal Patronus. Sirius, an unregistered Animagus with the form of a large black dog, conjures a Patronus that is also a large black dog.

Is Regulus Black related to Voldemort?

—Regulus’ parting letter to Voldemort [src] Regulus Arcturus Black ( 1961 – 1979) was an English pure-blood wizard, born to Orion and Walburga Black, and the younger brother of Sirius Black. He was a member of the House of Black, an old wizarding family, which probably started around the Middle Ages.

Did Dumbledore and Snape become friends later on?

With such events in the past, it is hard to believe that Dumbledore and Snape became real friends later on. Snape had trusted Dumbledore with keeping Lily safe from Voldemort, which Dumbledore failed to do.

Why didn’t Dumbledore believe in Sirius Black’s innocence?

So, mainly, Dumbledore didn’t believe in Sirius’s innocence until the end of Prisoner of Azkaban. Further, he did not have the power, ostensibly, to override legal decisions made by the Minister for Magic or the Department of Magical Law Enforcement (that said, we’ve seen Dumbledore step around Fudge more than once.

What was Regulus Black’s family background?

Regulus Arcturus Black ( 1961 – 1979) was an English pure-blood wizard, born to Orion and Walburga Black, and the younger brother of Sirius Black. He was a member of the House of Black, an old wizarding family, which probably started around the Middle Ages. He attended Hogwarts School of Witchcraft and Wizardry in 1972…