A Mysterious Patronus Drives Away the Dementors
Pages 385-386
Just as Harry loses consciousness, a powerful, silvery Patronus appears and drives the Dementors away. Harry, weak and barely conscious, sees the Patronus galloping across the lake and a familiar figure on the opposite shore. Although he cannot fully understand what is happening, the Patronus saves him, Sirius, and Hermione from the Dementors.
