This study centers on issues of marginality and monstrosity in medieval England. In the middle ages, geography was viewed as divinely ordered, so Britain's location at the periphery of the inhabitable world caused anxiety among its inhabitants. Far from the world's holy center, the geographic margins were considered monstrous. Medieval geography, for centuries scorned as crude, is now the subject of several careful studies. Monsters have likewise been the subject of recent attention in the growing field of "monster studies," though few works situate these creatures firmly in their specific historical contexts. This book sits at the crossroads of these two discourses (geography and monstrosity), treated separately in the established scholarship but inseparable in the minds of medieval authors and artists.