Pseudonym not found on published works: Lélio, Manassés, Bruxo do Cosme Velho.

nuc88-38173: Memorias póstumas de Blas Cubas, 1982 (hdg. on PPiU rept.: Machado de Assis, 1839-1908; usage: Joaquín María Machado de Assis)

Balas de estalo, 1998: title page (Machado de Assis) page 19 (pseudonym Lélio)

História de quinze dias, 2009: title page (Machado de Assis) page 16 (Manassés, pseudônimo que Machado assumiria em todas as crônicas de série.) page 65 (Manassés)

Wikipedia, Sept. 17, 2013 (Joaquim Maria Machado de Assis; known as Machado de Assis, Machado, or Bruxo do Cosme Velho; born June 21, 1839 in Rio de Janeiro; died September 29, 1908, Rio de Janeiro; of African descent; Brazilian novelist, poet, playwright, short story writer, literary critics, and advocate of monarchism. Widely regarded as the greatest writer of Brazilian literature) https://en.wikipedia.org/wiki/Machado_de_Assis

Machado de Assis. Epitaph of a small winner, 1990: translator's introducation, page xxiii (Through most of his life [Machado de Assis] worked as a public official -- a bureaucrat, we should say -- for it was almost impossible to earn a living as a writer; the Brazilian Academy of Letters unanimously elected Machado its president, a title that he held from the founding of the Academy in 1897 till his death in 1908)

Badaladas, 2019: title page (Dr. Semana; Machado de Assis)