"My Heart Leaps Up When I Behold" l. 1 (1807). Wordsworth also used the last three lines as the epigraph for his poem "Ode: Intimations of Immortality from Recollections of Early Childhood" (1807). See Milton 43
Arnold Gesell, Frances Lillian Ilg (1951). “Infant and Child in the Culture of Today: The Guidance of Development in Home and Nursery School (From the Former Clinic of Child Development, School of Medicine at Yale University)”