Soon afterward, a young Gellert Grindelwald arrived in Godric's Hollow to live with his great-aunt, Bathilda Bagshot, author of A History of Magic. The two young men took to each other immediately, and together they dreamed of a world ruled by wizards over Muggles by uniting the legendary Deathly Hallows. They believed that if they were forced to destroy a few along the way, it would still be "for the greater good", and the sufferings and losses would be rewarded a hundredfold in the end. However, this scenario would never happen, as an argument between Albus, Aberforth, and Grindelwald led to a duel that resulted in Ariana's death. For the rest of his life, Albus felt guilty, never certain whether it was his own curse or another's that had killed his sister. Grindelwald stormed back to Bagshot's home and departed to begin his own rule, leaving the country hours later. As a result of his mistakes, Albus felt that he was not to be trusted with power and, because of this, never took the position of Minister for Magic, despite being offered it several times. Dumbledore returned to Hogwarts as professor of Transfiguration, and he served in recruiting students for the school. Decades later, in 1945, Dumbledore finally defeated the now-Dark wizard Grindelwald, who had come to possess the Elder Wand. Grindelwald's defeat made Dumbledore the master of the Elder Wand, which remained his until just before his death, when Draco used the Disarming Charm on him. Dumbledore had another Hallow in his keeping since the death of James Potter: the Invisibility Cloak, which he had borrowed to examine. When James died, Dumbledore kept the cloak and decided to pass it on to Harry, James' son. The truth about Dumbledore's death is revealed through Snape's last memories in the Pensieve. Harry learns that Dumbledore made a terrible error by placing a cursed ring on his right hand, sometime between the fifth and sixth book, forgetting the curses that must be on the ring. The ring held the Resurrection Stone, which Dumbledore hoped to use to allow him to apologise to his sister and parents. Dumbledore called Snape to help him; however, when Snape arrived and assessed the curse, all he could do was contain it. Snape told Dumbledore that he had little more than a year to live. After hearing this news, Dumbledore revealed to Snape that he knew about