Here, in Margaret Jull Costa and Patricio Ferrari’s splendid new translations, are the complete poems of Alberto Caeiro, the imaginary “heteronym” coterie created by Fernando Pessoa, the Portuguese modernist master. Pessoa conceived Caeiro around 1914 and may have named him loosely after his friend, the poet Mário de Sa-Cárrneiro. What followed was a collection of some of Fernando Pessoa’s greatest poems, grouped under the titlesThe Keeper of Sheep,The Shepherd in Love, and