Mário de Sá-Carneiro was born in May 19, 1890 in Lisbon. In 1911 enters the Law school of Coimbra and, in the following year, he moves to the University of Paris to proceed with his Law studies, which he didn't conclude. In 1912 he publishes the play "Amizade"(Friendship) and the short stories volume "Princípio" (Principle). At this time, he starts to correspond with Fernando Pessoa. In this correspondence we can see reflected the aggravation of its emotional problems and his ideas of death and suicide. In 1914 along with the publication of "Dispersão" (Dispersion) and "A Confissão de Lúcio" (The confession of Lúcio), Sá-Carneiro intensifies his correspondence with Fernando Pessoa, to whom he sends its poems and drafts, disclosing increasing signals of pessimism and desperation.
In 1915, as part of the modernist group in Portugal, he participates in the publication of the magazine "Orpheu". In the second volume of this magazine he publishes the futurist poem "Manucure" that, along with the poem "Ode Triunfal" by Alvaro De Campos (one of the alternate identities of the poet Fernando Pessoa) caused impact and controversy in the literary community. In the same year he returns to Paris, where he lives in constant depression crises, aggravated by his financial difficulties.
In 1916, in a letter to Fernando Pessoa, he announces his intention to commit suicide, thar effectively occurs in 26 April, in a room of the Nice Hotel, in Paris.
The work of Mário de Sá-Carneiro is intimately related with his personal experience, it discloses all its maladjustment to the world and the constant search for itself which lead to self-destruction.