London, 1788: a group of British gentlemen---geographers, scholars, politicians, humanitarians, and traders---decide it is time to solve the mysteries of Africa's unknown interior regions. Inspired by the Enlightenment quest for knowledge, they consider it a slur on the age that the interior of Africa still remains a mystery, that maps of the "dark continent" are populated with mythical beasts, imaginary landmarks, and fabled empires. As well, they...