Columbia subject headings:
Harvard subject headings:
Arthurian romances--History and criticism.
Grail--Legends
Great Britain--History--Miscellanea.
Great Britain--History--To 1066--Prophecies.
Merlin (Legendary character)
Merlin (Legendary character)--Legends.
Prophecies (Occultism)--History.
Prophetia Merlini (Geoffrey of Monmouth)
Princeton subject headings:
Great Britain--History--Miscellanea.
Merlin (Legendary character)
Prophecies (Occultism)--History.
Prophetia Merlini (Geoffrey of Monmouth)