The Terrestrial Paradise by Sabine Baring-Gould

The exact position of Eden, and its present condition, do not seem to have occupied the minds of our Anglo-Saxon ancestors, nor to have given rise among them to wild speculations.

The map of the tenth century in the British Museum, accompanying the Periegesis of Priscian, is far more correct than the generality of maps which we find in MSS. at a later period; and Paradise does not occupy the place of Cochin China, or the isles of Japan, as it did later, after that the fabulous voyage of St. Brandan had become popular in the eleventh century.[37] The site, however, had been already indicated by Cosmas, who wrote in the seventh century, and had been specified by him as occupying a continent east of China, beyond the ocean, and still watered by the four great rivers Pison, Gihon, Hiddekel, and Euphrates, which sprang from subterranean canals. In a map of the ninth century, preserved in the Strasbourg library, the terrestrial Paradise is, however, on the Continent, placed at the extreme east of Asia; in fact, is situated in the Celestial Empire. It occupies the same position in a Turin MS., and also in a map accompanying a commentary on the Apocalypse in the British Museum.