In a sequence of publications in the 1760s, James Macpherson, a Scottish schoolteacher in the central Highlands, created fantastic epics of ancient heroes and presented them as genuine translations of the poetry of Ossian, a fictionalized Caledonian bard of the third century. In Ossianic Unconformities Eric Gidal introduces the idiosyncratic publications of a group of nineteenth-century Scottish eccentrics who used statistics, cartography, and geomorphology to map and thereby vindicate Macpherson's controversial eighteenth-century renderings of Gaelic oral traditions. Although these...