Arthur's death. He is king of Britain in some versions of the Havelok the Dane legend, beginning with Geoffrey Gaimar's 12th-century Estoire des Engleis. He is also mentioned as Arthur's successor in the 14th-century English alliterative poem known as the Alliterative Morte Arthure, following Arthur's war with the Romans and his subsequent mortal battle with Mordred. Other English romances that reference Constantine in passing include the 14th-century The Awntyrs off Arthure and Sir Gawain and the Carle of Carlisle, written around 1400. Jorge Ferreira de Vasconcelos's 16th-century Portuguese novel Memorial das Proezas da Segunda Távola Redonda fuses Constantine with the ubiquitous Round Table knight Sagramore, creating "Sagramor Constantino", Arthur's son-in-law and heir. As king, he forms a new Round Table to defeat the old enemies and continue the glory of Arthurian Britain.Vargas Díaz-Toledo 2013, para. 29–33. Constantine's relation to Arthur varies widely in these later works. Many works leave it unstated, while others follow the chronicles in making Constantine Arthur's nephew. Several romances, especially English works, cast him as Arthur's grand-nephew, with Cador being the son of a (generally unnamed) sister of the king. Constantine also appears as Arthur's heir in Thomas Malory's Le Morte d'Arthur, including sections adapted from the Alliterative Morte Arthure. Malory makes several changes to his source material that expand Constantine's role. Malory has Arthur designate Constantine and Baldwin of Britain as regents before going off to fight the Romans, a role that the Alliterative Morte ascribes to Mordred. Eugène Vinaver suggests that Malory modelled this change after Henry V's appointment of John, Duke of Bedford and Bishop Henry Beaufort as regents. Others finds it likelier that Malory simply wanted to replace Mordred in the Roman war narrative.Whitaker, pp. 15–16. Malory also expands Constantine's role after Arthur's death, saying that he ruled honourably and restored the Bishop of Canterbury to his seat. Scholars note that this expansion closes the book on a much more optimistic note than Malory's sources, indicating that Arthurian ideals lived on under Constantine.Simko, pp. 167–168. Modern literature and media Constantine features in some modern treatments of the legend. Katrina Trask's Under King Constantine, an 1892 book comprising three long romantic poems, is set in his reign. He is an important unseen character in Henry Newbolt's 1895 play Mordred in his usual role as Arthur's successor. He similarly appears in Rosemary Sutcliff's 1963 novel Sword at Sunset, in which the grievously wounded "Artos"