Definition
A Commission of Assize was a royal writ issued by the English Crown authorizing designated commissioners — typically senior judges or serjeants-at-law sitting alongside local knights — to hold assize proceedings in a given county or circuit. The commissioners so appointed were empowered to hear and determine civil actions, particularly those involving land disputes, in the intervals between the periodic visits of the justices in eyre. The commission gave both the authority to sit and the geographical scope of that authority. Over time, additional commissions were consolidated into or attached to it, and as the English court system evolved, the Commission of Assize was absorbed into the broader machinery of the Assize system and ultimately fell into complete disuse.
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Why It Matters in Research
This is primarily a term of historical English practice with no living operational meaning in modern common law jurisdictions. Researchers encounter it almost exclusively in pre-nineteenth-century English legal records, treatises, and procedural histories.
Several navigational points are worth noting:
First, the term is easily conflated with related but distinct commissions that ran concurrently or were eventually joined to it — most importantly the Commission of Nisi Prius and the Commission of Oyer and Terminer. Bouvier's own entry cross-references Courts of Assize and Nisi Prius, signaling that the Commission of Assize cannot be fully understood in isolation from those parallel instruments. Researchers tracing a specific judicial proceeding in historical English records may need to identify which commission actually authorized the sitting court, as jurisdiction and procedure varied by commission type.
Second, the term appears in sources across a long historical arc, from the Assize of Clarendon (1166) and the later statutes of Westminster through the nineteenth-century consolidation of English circuit courts. The commission's practical role changed substantially over this span, and a citation to "commissioners of assize" in a thirteenth-century source carries different procedural meaning than the same phrase in an eighteenth-century record.
Third, the phrase "commission" here is a technical term of art — it refers to the formal instrument of royal delegation, not a standing court or body. This matters when reading original sources: the commission was issued anew for each circuit, and the authority of the judges derived from it directly.
Fourth, for researchers using the Law Mind corpus to study English judicial administration, the Commission of Assize is a gateway term that connects to a cluster of related instruments and court structures. Following Bouvier's cross-reference to Courts of Assize and Nisi Prius is recommended before treating this entry as self-contained.
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Historical Dictionary Support
Bouvier's is the sole source dictionary for this entry, and its treatment is brief but structurally accurate. Bouvier identifies the commission as issuing from the king, names the commissioners as sitting "in association with discreet knights," locates its function as filling the gap between eyres, notes the accretion of additional commissions over time, and closes with the frank acknowledgment that it has "finally fallen into complete disuse." That summary correctly captures the arc.
What Bouvier does not supply — and what researchers relying solely on this entry will miss — is any account of how the Commission of Assize related to the Statute of Westminster II (1285) or to the broader development of the nisi prius system, which eventually became the dominant mechanism for trying civil issues on circuit. Blackstone's Commentaries and Holdsworth's History of English Law are the standard secondary authorities for filling that gap, though neither is available as a source dictionary in this entry.
The cross-reference Bouvier appends ("See COURTS OF ASSIZE AND NISI PRIUS") is the most practically useful part of the entry for historical researchers, directing attention to the institutional context that gives the commission its meaning.
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Jurisdictional Note
The Commission of Assize is a creature of English law and has no direct American counterpart. American colonial courts derived some procedural lineage from English assize practice, but the commission form itself was not transplanted to the colonies in any systematic way. Researchers working in early American legal history should not assume English assize terminology maps cleanly onto colonial or early republic judicial structures.
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