Definition
Ocgasiones is an archaic Latin term from old English law denoting assarts — that is, the act of clearing and converting forest land into arable or productive agricultural ground. The term refers specifically to unauthorized or licensed encroachments upon royal forest land, where trees were felled and the ground broken up for cultivation. Such clearings carried legal significance because royal forests were subject to the Crown's forest law, and any conversion of forest to farmland required royal license or was otherwise subject to fines and penalties.
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Why It Matters in Research
Researchers encountering ocgasiones in medieval English records, rolls, or pleadings should treat it as a synonym for assarts and navigate accordingly. The term surfaces primarily in forest eyre records, pipe rolls, and court proceedings involving Forest Law from roughly the twelfth through fifteenth centuries, when the administration of royal forests was a significant source of Crown revenue and legal controversy.
Several traps exist for researchers in historical sources:
First, the Latinized and variant spelling of the term reflects the inconsistency common in medieval legal manuscripts. Spellings vary, and indexers in calendared documents may have rendered the term differently or collapsed it under the heading of "assarts" without cross-referencing the Latin form.
Second, the distinction between an assart (the cleared land itself) and the act or offense of assarting is not always maintained consistently in historical records. Ocgasiones may describe the physical clearings, the fines imposed for them, or both, depending on context.
Third, researchers should be aware that forest law operated as a parallel legal jurisdiction in medieval England, separate from the common law courts, with its own officers (foresters, verderers, regarders), its own courts (the swainmote and forest eyre), and its own offenses. References to ocgasiones will therefore appear in records generated by that distinct administrative and legal machinery rather than in ordinary common law pleadings.
Corpus connections: For full context, researchers should read ocgasiones alongside related forest law terms such as assart, purpresture, waste, and vert and venison, all of which describe different categories of encroachment or injury to the royal forest.
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Historical Dictionary Support
Black's Law Dictionary (2nd Ed., Supplemental) provides a brief but direct entry: "In old English law. Assarts. Spelman." The reference to Spelman points to Sir Henry Spelman's Glossarium Archaeologicum, the major seventeenth-century glossary of archaic legal and feudal Latin terms, which remains an authoritative reference for this class of vocabulary. No elaboration beyond this identification is offered in Black's.
Historical dictionary coverage of ocgasiones is sparse precisely because the term is a narrow technical word belonging to a specialized jurisdiction that had largely ceased to function by the time the major English legal dictionaries were compiled. Spelman's Glossarium is the primary historical authority; Blount's Nomo-Lexicon and similar compilations may also contain related entries under assart. Researchers should not expect coverage in later American legal dictionaries, as the term has no relevance outside the English medieval context.
The convergence of available sources on the identification of ocgasiones with assarts is complete — there is no meaningful divergence. The interpretive challenge is not definitional but contextual: understanding what the English Crown's forest law meant in practice, and how assarting was regulated, licensed, penalized, and recorded.
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Jurisdictional Note
Ocgasiones is exclusively a term of old English law. It has no application in American law, Scottish law, or post-medieval English common law. Researchers will encounter it only in the context of medieval English Forest Law and its documentary record.
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