Includes: Sigui 1967: L'enclume de Yougo, Sigui 1968: The Dancers of Tyogou, Sigui 1969: The Cave of Bongo, Sigui 1970: The Clamours of Amani, Sigui 1971: The Dune of Idyeli, Sigui 1972: The Loincloths of Yamé, Sigui 1973: The Canopy of Circumcision, Sigui Synthesis: The Invention of Speech and Death