Gervase's
Otia imperialia is an encyclopedic work concerning history, geography, physics, and folklore, in the manner of speculum literature. It is sometimes associated with the
Ebstorf Map, to the extent that some claim the map was meant to accompany the text, but this is a subject of continued debate. The text is divided into three parts (
decisiones). The first is a history of the world from the Creation to the Flood. The second is a geographic treatise on the regions of the known world, as divided between Noah’s three sons. The third section, parts of which have been reprinted separately from the rest of the book, is a compendium of marvels. Like
Honorius of Autun’s
Imago mundi and
Vincent of Beauvais’s
Speculum naturale, the
Otia imperialia contains fables attributed to
Pliny the Elder and
Solinus, as well as other tales and folk beliefs, including the Fairy Horn, a Gloucester variety of the widespread
fairy cup legend; the supernatural powers of
Virgil; the folk belief that a priest's cloak could be viewed as an element pitting good Christians against the Devil; and the first recorded instance of the
Wandlebury Legend, which Gervase summarizes as follows:In England, on the borders of the
diocese of Ely, there is a town called
Cantabrica, just outside which is a place known as
Wandlebria, from the fact that the Wandeli, when ravaging Britain and savagely putting to death the Christians, placed their camp there. Now, on the hill-top where they pitched their tents, is a level space ringed with entrenchments with a single point of entry, like a gate. A very ancient legend exists, preserved in popular tradition, that if a warrior enters this level space at dead of night by moonlight and calls out 'Knight to knight, come forth', he will at once be faced by a warrior armed for fight, who charging horse against horse, will either dismount his adversary or himself be dismounted. Some legends are found only in the
Otia imperialia, including two later included in
Thomas Keightley’s influential
The Fairy Mythology. One describes the "
portunes”, diminutive humanoids found in France and England, which help peasants finish their domestic chores, but also delight in leading English travellers’ horses into mud. Another is the
Grant, a creature of English legend which resembles “a yearling colt, prancing on its hind-legs” and which runs through towns to warn of impending fire. This belief persisted well into the 20th century around Cambridgeshire, albeit applied to hares. ==Reception==