Beate Schmolke-Hasselmann's study of Arthurian verse romance was first published in German in 1985, but her radical argument that we need urgently to redraw the lines on the literary and linguistic map of medieval Britain and France is only now being made available in English. Updated with a new foreword and a supplementary bibliography, this study serves as a contribution to both reception history, examining the medieval response to Chretien's poetry, and genre history, suveying the evolution of Arthurian verse romance in French over two centuries.