Complex sentence: At the age of thirteen Edward Hale enrolled in Harvard and graduated, the youngest in the class of 1839; While at Harvard he settled in with the literary set, won two Bowdoin prizes, graduated second in his class, and was considered the Class Poet.
Split into simpler sentences: At the age of thirteen Edward Hale enrolled in Harvard, as the youngest in the class of 1839. While there he settled in with the literary set, won two Bowdoin prizes, and was considered the Class Poet.