Arthur de Araújo Pereira Ramos was born in the municipality of Pilar, todayManguaba, in Alagoas, inthe house at 195 Amazonas Street (nowadaysWenceslau Batista Avenue), on 7July 1903, to doctor Manuel Ramos de Araújo and Ana Ramos.

René Ribeiro was born on 3 January 1914, in the city of Recife, to Jefferson Firmino Ribeiro and Celina Osias Ribeiro.

Vicente Juarimbu Salles was a leading researcher and promotor of Amazonian history and culture. Born in 1931 in Vila de Caripi, in the Igarapé-Açu municipality – 117km from Pará’s state capital Belém – he graduated in Social Sciences with an emphasis on Anthropology.

Waldemar de Figueiredo Valente, doctor, pharmacist, anthropologist, sociologist, ethnologist, teacher, researcher, writer and humourist, was born on 9 February 1908, on the Conceição St in the neighbourhood of Boa Vista, in central Recife, to poet and journalist Samuel da Silva Valente and Orminda d