Kreacher Reveals Regulus's Mission to Destroy the Horcrux

PAGES: 193-196

Kreacher shares the full story of how Regulus Black learned about Lord Voldemort's Horcrux and attempted to destroy it. He took Kreacher to the cave where the Horcrux was hidden and drank the poison in the basin, ordering Kreacher to switch the real locket with a fake. Regulus was then killed by the Inferi in the lake, and Kreacher was unable to destroy the Horcrux despite many attempts.