* GeniusBonus: Cadfael's conflicts with Prior Robert and other conservative monks are a microcosm of the intellectual conflict then raging in Western Europe between neo-Aristotelianism and Augustinianism. Neo-Aristotelianism originated in the Middle East, where Cadfael spent his youth.
* MoralEventHorizon: [[spoiler:Corbière]] in ''Saint Peter's Fair'' crosses it when he threatens to rape Emma.
** This is how Hugh Beringar, a loyal official, views [[spoiler:Bourchier, alias Cuthred]] betraying his liege in her darkest hour.