Definition
A Latin maxim of medieval English procedure meaning "the assize falls into a jury" or "the assize turns into a jury." The phrase describes the procedural event by which a matter originally commenced as an assize — a specific, formalized mode of royal inquiry — was converted into or resolved by ordinary trial by jury. In practical terms, when the rigid procedural requirements of an assize could not be satisfied, or when the parties consented to a broader inquiry, the proceeding shed its assize form and proceeded instead as a common jury trial.
Why It Matters in Research
This phrase will appear in medieval and early modern English legal records, Year Books, and treatises dealing with the development of the common law jury. Researchers encountering the phrase in historical sources should understand that it marks a procedural transition point, not a substantive ruling. It signals that the record will shift from the constrained procedural world of the assize — with its fixed number of recognitors, its limited scope, and its particular writ — into the more flexible mechanism of the jury trial proper.
The phrase is significant for understanding the organic growth of trial by jury in English legal history. The assizes, particularly the Grand Assize and the petty assizes established under Henry II (including the Assizes of Novel Disseisin, Mort d'Ancestor, and Darrein Presentment), were highly specialized proceedings with narrow jurisdictional scope. When a case fell outside the technical requirements of the assize form — because a required party was absent, a procedural condition failed, or the matter required a broader inquiry — the court would allow or require the proceeding to continue as a jury trial. The maxim names that moment of conversion.
Researchers tracing the history of jury trial should treat this phrase as a junction in the procedural record. Its presence indicates that what follows in the document is jury-trial procedure, not assize procedure, and that the earlier assize-form pleadings may not fully define the issues as they were ultimately tried.
Historical Dictionary Support
Black's Law Dictionary renders the phrase tersely as "assise falls (turns) into a jury; hence to submit a controversy to trial by jury." This translation is accurate as far as it goes, but the bare definition underserves the procedural significance of the term. Black's does not distinguish between the assize as an institutional form — a royal writ and proceeding with fixed rules — and the jury as a distinct mechanism that absorbed the assize's function over time. For a researcher relying solely on Black's, the phrase might appear to be merely synonymous with jury trial generally, which misses its specific procedural meaning as a transitional event within a single proceeding.
The historical dictionaries do not provide commentary on why a case would make this conversion or what consequences followed from it. Researchers needing that context must look to secondary sources on common law pleading and the Henrician assizes, such as Maitland's writings on early English legal history or Pollock and Maitland's The History of English Law Before the Time of Edward I, which address the relationship between assize and jury in detail.
Jurisdictional Note
This term belongs exclusively to the historical common law of England. It has no living application in any modern jurisdiction. It is relevant only in historical legal research, medieval records, and scholarship on the development of trial by jury.