When does Mafatu hear the sound of drums in call it courage?

In "Call It Courage," Mafatu hears the sound of drums when he is on the island, particularly during a moment of heightened tension as he realizes that he is not alone. The drums signal the presence of the islanders, which evokes fear and memories of his past. This sound serves as a pivotal point in the story, reflecting his internal struggle with courage and his desire to confront his fears.