In this quote, Lady Friday addresses Leaf, recognizing him as the one responsible for causing trouble and disrupting her plans on Saturday. She refers to him as a "small troublemaker" who managed to foil her scheme, indicating that his actions were significant enough to interfere with her intentions.
She also mentions that Leaf is a friend of Arthur Penhaligon, the Rightful Heir, suggesting a connection between the two characters. Lady Friday's tone is somewhat amused and acknowledging, as she comments on Leaf's visit and his role in the events, hinting at the complex relationships and conflicts in the story.