illustrate Michelangelo's concern about the pace of Ghirlandaio's instruction
establish Ghirlandaio as a wrathful taskmaster
raise the question of Michelangelo's right to pry into the bundle
convey Michelangelo's interest in drawing for its own sake and indifference to creating frescoes
relate an incident foreshadowing Michelangelo's future role as the greatest artist of his era