Fernando Pessoa (1888–1935) was a Portuguese poet who posthumously became highly regarded in European literature. Alberto Caeiro was the first of his major
heteronyms, a term he used for what was a mixture of pen names, author
personas and fictional characters. According to a letter Pessoa wrote to the literary critic
Adolfo Casais Monteiro, he created Caeiro on 8 March 1914, when he wrote a first series of poems for what would become ''''. The first time any material was published under Caeiro's name was in January 1925, when 23 poems from
The Keeper of Sheep appeared in issue 4 of ''
, a literary journal edited by Pessoa together with . Some of the Uncollected Poems
were published in Athena
no. 5. Further material appeared in Presença'' in 1931. Pessoa continued to revise the poems throughout his life and some of them exist in many variants.
Eduardo Lourenço stressed the influence from
Walt Whitman, notably in the 1977 essay, "Walt Whitman e Pessoa" ("). According to Lourenço, the heteronyms Caeiro and
Álvaro de Campos emerged through an "explosion of Pessoa's universe when confronted with Whitman's universe". Lourenço distinguished Campos, where the influence from Whitman is more direct, from Caeiro, where it is suppressed. In a text uncovered after Lourenço wrote his essay, Pessoa commented, under his English-language heteronym Thomas Crosse, on perceived similarities between Caeiro and Whitman, arguing that Caeiro was a superior poet and there was no influence from Whitman. Based partially on Pessoa's assertive denial, the scholar
Richard Zenith argues that the influence from Whitman was considerable. ==Life and views==