She is one of the proponents of the theory (or related theories) that states that the historical basis for King Arthur and the Knights of the Round Table were a 2nd-century Roman officer named Lucius Artorius Castus and Sarmatian auxiliary horsemen, which Artorius supposedly commanded in Britain.
The possibility that Lucius Artorius Castus was the inspiration for the figure of Arthur in medieval European literature was first suggested by Kemp Malone in 1924 and has recently been championed by authors C. Scott Littleton and Linda Malcor (who was a research consultant for the 2004 movie King Arthur and on whose hypotheses regarding Artorius the screenplay was based).
There, the ducks meet "King Arthur"—Artorius Riothamus, the last descendant of Lucius Artorius Castus, and find out that he is nowhere near the glorious benevolent ruler history has made him to be; instead, he's a common warlord without much morals to speak of.
Lucius Verus | Lucius Cornelius Cinna | Lucius D. Clay | Lucius Tarquinius Priscus | Lucius Artorius Castus | Lucius Antonius | Lucius Allen | Lucius Tarquinius Superbus | Lucius Accius | Lucius | Wilbur Lucius Cross | Pope Lucius III | Lucius Scribonius Libo | Lucius Roscius | Lucius Junius Brutus | Lucius Cassius Longinus | Lucius Cary, 2nd Viscount Falkland | Lucius Beebe | Lucius Annaeus Cornutus | Lucius Aelius | Pope Lucius II | Lucius Quintus Cincinnatus Lamar (II) | Lucius O'Brien, 15th Baron Inchiquin | Lucius Nonius Calpurnius Torquatus Asprenas | Lucius Lyon | Lucius de Mello | Lucius Clodius Macer | Lucius Calpurnius Piso Licinianus | Lucius Caecilius Metellus Calvus | Lucius Arruntius Camillus Scribonianus |
Lucius Artorius Castus, a 2nd-3rd century general sometimes connected with a historical basis for King Arthur.