C.I. Defontenay (1819–1856) was the pseudonym of French science fiction writer Charlemagne Ischir Defontenay. Defontenay's 1854 Star, ou Psi Cassiopea is seen by some as an example of proto-space opera. Others see Defontenay as a predecessor of Olaf Stapledon. Star describes the discovery in the Himalayas of a stone that has fallen from the sky. After opening it, it turns out to contain a metal box where the narrator finds some paper manuscripts. After two years of study, he managed to decipher them and finds out that they describe the alien societies of various humanoid races living in the constellation of Cassiopeia.