1809-1892 19thcentury active15thcentury adaptations alfredtennyson arthur arthurianromances comparativeliterature englishandgerman englishliterature germanandenglish germanic germanliterature history historyandcriticism inliterature kingsandrulersinliterature knightsandknighthoodinliterature malory medievalism middleagesinliterature mythology nibelungeninliterature tennyson thomas