Presents in an original way part of the Louis Agassiz's Brazilian photographic collection. Created in Rio de Janeiro and Manaus during the Thayer Expedition in 1865-1866. The book gathers artists, curators, photographic historians, anti-racist activists, in examining a series of 19th century racial photographs. This book reflects upon how images associated to thoroughly outdated beliefs and scientific knowledge continue to haunt not only visual culture but also the politics of memory.