Francisco Luís Pereira de Sousa (1870-1931) was born in Funchal, the capital of the mid-Atlantic Portuguese archipelago of Madeira. He was a geologist by profession and is well known for his 1914 study of the devastating Lisbon earthquake of 1755. He speculated(a) that this tragic event might have been the last ‘gasp’ of a sunken Atlantis. He also suggested that Atlantis had originally occupied most of the Atlantic, linking Africa, Europe and America. He considered the Canaries and his native Madeira to be present-day remnants of Plato’s island.