The general eyre sent royal justices through every English county with power to investigate everything at once — crimes, taxes, the misdeeds of local officials — in sessions so sweeping, and so profitable to the crown in fines, that chroniclers record communities dreading the visitation and men fleeing before it. The eyre collapsed under its own procedural weight in the mid-fourteenth century, replaced by regular, narrower assize circuits with professional judges.
Justice in eyre no longer exists as a living trade. Here is what erased it, and which profession took on the work.
500 – 1500
Qadis, magistrates and itinerant justices
Three great professional traditions matured in parallel. The Islamic world salaried qadis in every major city, applying a jurists' law that the ruler did not write. China staffed its counties with scholar-officials selected by imperial examination, each serving as investigator, prosecutor and judge in one — Song-dynasty official Bao Zheng became the culture's immortal ideal of the incorruptible magistrate. In Europe, royal justices rode circuit from 1166, replacing trial by ordeal after the Church withdrew its priests in 1215, and slowly manufacturing England's common law as they went.
What else was happening then
1166
Henry II sends out the justices
The Assize of Clarendon dispatched royal justices on circuit through England's counties, backed by local juries of presentment that named suspects on oath. The travelling judges gradually welded regional customs into a single "common law," and their successors — the circuit judges of the common-law world — still ride versions of those circuits today.
Where that work lives now
The person societies trust to decide: from Hammurabi's stele to AI-scored bail hearings, the hardest disputes still end in front of one accountable human.
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