‘And did he — by any chance — let fall the cause — er, that’s to say, the regime, nostrum, jorum, physic, diet, whatever it is he does or takes — to which he attributes his great number of years?’ — Roy Twite to his niece, chapter 5
The so-called Matter of Britain — la matière de Bretagne — permeates Joan Aiken’s marvellous Wolves Chronicles. The term comes from the prologue of the Chanson des Saisnes (“song of the Saxons”) by Jean Bodel (d 1210) in which he distinguishes three thematic strands suitable for epics: the myths and legends of Rome; the stories arising from the heroic Carolingian period in France; and the Arthurian and Celtic romance tradition associated with Britain and Brittany.
The Arthurian strand has continued to thread through literature since it emerged in the pseudohistorical History of the Kings of Britain by the 12th-century writer Geoffrey of Monmouth. Joan Aiken somehow couldn’t help but introduce Arthurian motifs into her fiction, whether Mortimer and the Sword Excalibur for younger readers or several times in the series beginning with The Wolves of Willoughby Chase.
She’d previously included Welsh Arthurian motifs such as the Hunt of the Giant Boar in The Whispering Mountain and the Return of King Arthur in The Stolen Lake. In Is Underground (Is in the UK) one particular Arthurian legend comes to the fore — that of the Holy Grail, sometimes called the Sangreal — but, as we’ll see in due course, it isn’t the only recurring Chronicles theme that we will meet in these pages.