ローマ帝国衰亡史
The two principal sources for "Count Robert" were "Histoire de l'Empereur Aléxis" by Anna Comnena, included in "Histoire de Constantinople" by Louis Cousin (1672–74), and "The History of the Decline and Fall of the Roman Empire" (1776–88) by Edward Gibbon. Scott was more inclined towards Gibbon's sceptical approach as opposed to Anna's panegyrics.