Among his most famous alter egos are Alberto Caiero, Alvaro de Campos, and Ricardo Reis-later to be used by Jose Saramago.  
During his lifetime, he published 3 books of poetry in English, including Antinous, and one volume in his native tongue, Mensagem.  After his death, it was realized that at least 72 different published poets were actually "heteronyms", each in their own style, of this one author.  Among his most famous alter egos are Alberto Caiero, Alvaro de Campos, and Ricardo Reis-later to be used by Jose Saramago.  FTP, name this author, considered Camoes' [ka-mosh] successor as Portugal's national poet.
During his lifetime, he published 3 books of poetry in English, including Antinous, and one volume in his native tongue, Mensagem.  
Fernando Antonio Nogueira Pessoa