Definition
The Assisa de Clarendon (Assize of Clarendon) is a royal ordinance issued by King Henry II of England in 1166 — not, as Black's and Burrill's state, in the tenth year of his reign, which would place it around 1164. The document is one of the foundational instruments of English criminal procedure. It established a systematic process for the presentment and trial of persons accused of serious crimes, creating an early form of the grand jury by requiring twelve men from each hundred and four men from each vill to present suspected criminals to the king's justices. It also reorganized the use of trial by ordeal and mandated the construction of jails in counties lacking them.
The provision cited in the historical dictionaries — granting a condemned person who could not purge himself and was required to abjure the realm forty days to seek aid from friends before departing — represents only one narrow clause of the assize. The full document is considerably broader in scope and significance.
Common Confusion
Two documents share nearly identical names and are routinely conflated: the Assize of Clarendon (1166) and the Constitutions of Clarendon (1164). Burrill's entry begins to flag this distinction before the surviving text cuts off. The Constitutions of Clarendon addressed the relationship between royal and ecclesiastical courts and precipitated the conflict between Henry II and Thomas Becket. The Assize of Clarendon is a criminal procedure document with no direct connection to the church-state controversy. Researchers encountering "Clarendon" in medieval legal sources must determine which instrument is being referenced. A companion ordinance, the Assize of Northampton (1176), extended and modified the Assize of Clarendon; the two are sometimes treated together.
Why It Matters in Research
The historical dictionaries give a drastically compressed account. Both Black's and Burrill's reduce the Assisa de Clarendon to its abjuration clause, which is a single procedural detail. A researcher relying on either entry alone would miss the document's central importance: it is among the earliest English sources for the grand jury, for systematic royal oversight of criminal justice, and for the principle that local communities bear institutional responsibility for presenting criminals to royal authority.
Dating is a research trap. The "tenth year of Henry II" formula used by both dictionaries points to approximately 1163-1164, but the Assize of Clarendon is dated by modern historians to 1166. The Constitutions of Clarendon fall in 1164. The confusion in the dictionaries may reflect either a dating error or a conflation of the two Clarendon documents. Researchers working with primary sources should not rely on the dictionary dates without independent verification.
The corpus connection to abjuration is real but peripheral. If your research concerns abjuration of the realm specifically, the Assisa de Clarendon is a relevant source, but so are later statutes and common law practice extending into the seventeenth century. If your research concerns grand jury origins, presentment procedure, or the development of royal criminal jurisdiction, this document is primary — and the dictionary entries will not tell you that.
Citations in the historical dictionaries to Bracton (fol. 136) and Coke's Littleton (159a) are genuine and traceable. Bracton's treatment of abjuration and Coke's commentary both address the forty-day provision. These remain useful starting points for the narrow abjuration question.
Historical Dictionary Support
Black's and Burrill's entries are nearly identical word-for-word, both drawing from Cowell's legal dictionary and repeating the same Bracton and Coke references. Neither entry situates the assize within the broader Angevin legal reforms or explains its procedural architecture. The agreement between the two dictionaries reflects shared sourcing rather than independent verification.
Burrill's entry is slightly more valuable for one reason: it begins a caveat — "This must not be confounded with" — before the surviving text breaks off in the available corpus. The fact that Burrill recognized the confusion risk is itself informative; the distinction between the Assize of Clarendon and the Constitutions of Clarendon was apparently a known research hazard even when Burrill was writing.
Both dictionaries treat the document as a "statute or ordinance," which is a reasonable characterization but flattens the distinction between royal assize and parliamentary statute — a distinction that mattered more as constitutional theory developed than it did in 1166.
Jurisdictional Note
The Assisa de Clarendon is purely an English legal history document with no direct operative effect in any modern jurisdiction. Its relevance in American legal research is historical and theoretical: courts and scholars tracing the constitutional roots of the grand jury, the right to presentment, or the development of due process sometimes trace lineage through documents of this kind.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Grand Jury — Historical Origins; Abjuration; Assize Courts; Constitutions of Clarendon.