Hedwig is injured and brings a mysterious letter

PAGES: 356-359

During History of Magic, Hedwig arrives at the classroom window with a letter for Harry, but something is wrong with her wing. Concerned for his owl's wellbeing, Harry leaves class under the pretense of being unwell and takes Hedwig to Wilhelmina Grubbly-Plank for treatment. He also receives a cryptic note from Sirius.