During this voyage, he wrote a letter to Carlos Quijano, editor of a Uruguayan weekly, which was later retitled Socialism and Man in Cuba.
Selama perjalanannya, ia menulis sebuah surat kepada Carlos Quijano, seorang penyunting surat kabar mingguan di Uruguay, dan surat-surat ini kemudian diberi judul Sosialisme dan Manusia di Kuba.