The Roman de Fergus is an Arthurian romance written in Old French probably at the very beginning of the 13th century, by a very well educated author who named himself Guillaume le Clerc (William the Clerk).

The main character is Fergus, the son of Soumilloit (a name corresponding to Sorley or Somerled; Scottish Gaelic: Somhairle), a rich but old-fashioned farmer and a noble Arthurian woman who rises to become the best knight of King Arthur.

Also noted by scholars is the Roman's extensive knowledge of the geography of southern Scotland, which is in general depicted in an exceedingly accurate manner.

The Roman could be the first piece of non-Celtic vernacular literature to have survived from Scotland, an honour often thought to belong to The Brus of John Barbour, written one and a half centuries later in Middle English.

The Roman de Fergus however shows that, despite its future, French-culture flourished in Scotland during the High Middle Ages.

Beginning in Carlisle, King Arthur and his knights chase a great white stag, which eludes them until Percival finally captures it in Galloway.

Following his introduction to chivalry, Fergus makes his way to Liddel Castle, where he first encounters Galiene, the niece of the castellan.

He searches for her in vain for a year, until he meets a dwarf who tells him that he will retrieve his lost love if he can obtain a shield from a hag in Dunnottar Castle.

With renewed hope, Fergus makes his way to Queensferry, to cross from "England" into "Scotland"; however, he gets into a dispute with the boatmen, dispatches them all, and is forced to sail himself over.

News of the attendant's failure brings Galiene to grief, because the combat must take place the following day.

Arthur decides personally to set out in search of Fergus, but Gawain counsels that he has a better chance of finding him if he hosts a tournament.