As Heidi travels up the mountain, the heavy burden of her aunt’s practical concerns becomes too much to bear. The narrative highlights a moment of spontaneous liberation as Heidi struggles to keep up with the boy, Peter. Finding her layers of clothing restrictive, she decides to discard them entirely. The text describes her actions as "quick as lightning," as she strips away her "Sunday coat," her "everyday one," and the "hot red shawl." By the time she finishes, she stands in only her "little slip," fully embracing the freedom of the mountainside. This act of shedding her societal layers serves as a powerful metaphor for her transition from the constraints of her past life to the untamed environment of the Alps.
Heidi’s carefree spirit is quickly interrupted by her aunt, Data, who is horrified to find the child in such a state. Data’s reaction is one of immediate indignation, labeling Heidi a "rotten little thing" and a "selfish child" for discarding the "new shoes" and "new stockings" she had provided. Data’s frustration is rooted in the inconvenience of the situation, as she forces Peter to "fetch them" from down the mountainside. This scene establishes the cold dynamic between the two; Data is focused on duty and appearance, while Heidi is focused on the sensory experience of her surroundings, oblivious to the "sense" that Data demands of her.
Upon reaching the summit, the group arrives at the grandfather's hut, a "beautiful place" perched on a cliff with a "full view of the valley below." The grandfather is introduced as a formidable, gruff figure with a "long beard" and "thick gray eyebrows" that resemble a "bush." When Heidi approaches him, she shows no fear, staring directly at his intense face. The grandfather, however, is immediately hostile, questioning the presence of the child and demanding that Peter "be off with your goats." His initial rejection of Heidi sets a tense tone for their future coexistence.
The climax of the encounter occurs when Data declares, "The child is here to stay with you." She justifies this abandonment by claiming she has "done my duty" for the last four years and now wishes to "go out and be on my own." Despite the grandfather’s valid concern regarding what he should do if the child begins to "cry and whine," Data remains callous, insisting, "That’s your problem." She shifts the burden of care entirely onto him, warning him that he will "have to answer for it if anything happens to the girl."
As Data flees the mountain, she is haunted by the weight of her actions. The "shame and embarrassment" she feels is exacerbated by the local neighbors, who call out, "Where have you left the child?" The narrative concludes with Data unable to answer, her conscience pricked by the realization that she has left Heidi with an "old man whom everybody knew was not very nice." This abandonment marks the end of Heidi’s previous life and the beginning of a challenging, isolated existence on the mountain, left entirely to the mercy of a man who initially wanted nothing to do with her.