Elf Tails

Harry, Hermione, and Ginny visit Ron in the hospital wing. They discuss the poisoning and the earlier attack on Katie Bell, concluding that both were likely attempts on Dumbledore's life. Hagrid reveals that Dumbledore had a heated argument with Snape, which Harry finds deeply suspicious. Later, Harry sets Kreacher and Dobby to tail Draco Malfoy. They report that Malfoy has been making regular visits to the seventh floor, entering a room with other students standing guard. Harry realizes Malfoy is using the Room of Requirement. He is determined to find out what Malfoy is doing there, despite Hermione's skepticism.