The Year 5865 was published in 1865. It is a remarkable novel, consisting of a first-person narrative related by a character living 4000 years hence, after various disasters have obliterated almost all the documents relating to the world with which we are familiar. In consequence, the narrator's knowledge of the reader's world is severely limited and densely clouded by myth. Hippolyte Mettais' innovative literary method in attempting to interpolate didactic material into a melodrama provides an anticipatory echo of a future subgenre of popular fiction: the "lost race" story. But unlike H. Rider Haggard's She (1887), Abraham Merritt's Dwellers in the Mirage (1932) and other classics, here, it is not present-day explorers who find relics of an ancient civilization but futuristic explorers who find echoes of ours. A remarkable pioneer of futuristic fantasy, The Year 5865 is a uniquely intriguing classic of the genre, log ripe for rediscovery.

In Paris Before the Deluge (1866), Hippolyte Mettais, the author of The Year 5865, displays his imaginative reach, creating a novel that incorporates the lost city of Atlantis, the biblical story of the Flood, and the founding of Paris. Set more than four thousand years in the past, Paris Before the Deluge is a lesson about the rise and fall of civilizations with its credible mixture of exotic locales, spurned lovers, power grabs, lost dynasties and the constant quest for the favor of ancient gods. Within this mythological antediluvian world, Mettais unfolds a tale of religious and revolutionary sentiments that remains an important document in the history of French speculative fiction as well as the modern development of the Atlantis legend.