From 1713 until 1716 Lourenço studied in Holland. Upon his return to Portugal, he completed a doctorate in canon law at Coimbra. Such was his prestige in academic circles that João V made him a member of the Academy of History and appointed him to a chaplaincy in the royal household. Lourenço went on to invent many other devices, including a machine for grinding sugar-cane.
It has not been established precisely when he converted to Judaism, but when he realised that the Inquisition had begun investigating him and was about to order his arrest, he fled from Lisbon in September 1724 and found sanctuary in Spain. He died several months later at the Hospital de la Caridad in Toledo, finally reconciled with the Roman Catholic Church.
Today, Lourenço is largely remembered as a pioneer of aviation
Publishers' Note
The English text as originally published embodied a number of editorial amendments which the author requested be overruled; the labour of reinstating the text in accordance with the author's wishes was undertaken by Giovanni Pontiero. The text of the present edition is thus in conformity with the author's and the translator's wishes.
Acknowledgments
I wish to express my deep gratitude to José Saramago, Stefanie Goodfellow, Teresa Nunes, Carlos Sachs, Maria Fernanda Româo, Paul Berman, Drenka Willen, Neil Ferguson, and Thomas Colchie. Their encouragement and assistance proved invaluable in the preparation of this translation
GIOVANNI PONTIERO
Manchester 1986