Definition
A writ of English law, now wholly obsolete, directed to a corporation commanding it to carry weighing scales or weights to a designated haven for the purpose of weighing wool that had been licensed for export. The writ was a mechanism of medieval royal administration, enabling the Crown to enforce the weighing requirements that governed the licensed wool trade before wool could lawfully be transported overseas.
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Why It Matters in Research
This term will appear only in historical English legal sources and has no modern operative significance. Researchers encountering it in medieval or early modern records should understand that it belongs to the apparatus of the English staple system — the Crown's administrative control over the export of raw wool, one of England's most economically significant medieval commodities. The writ presupposes the existence of an authorized weighing station at a port or haven, a licensing regime for wool exporters, and a corporation (likely a town or guild body) charged with maintaining the weighing infrastructure.
Because bilanciis deferendis is cited to Reg. Orig. 270 — the Registrum Omnium Brevium, a formulary of original writs — researchers tracing it should consult that register directly. The Registrum is the primary repository of writ forms used in the English common law courts, and citations to it are among the oldest standardized legal references in the tradition. The writ does not appear to have generated reported case law; its historical trace is in the formulary record rather than in judicial decisions.
Researchers working in the history of English commercial regulation, customs administration, or the law of weights and measures may find this writ contextually useful even if it is never itself at issue. It demonstrates how the Crown delegated enforcement functions to corporate bodies in the medieval period and how trade regulation was managed through the writ system rather than through statute or contract.
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Historical Dictionary Support
Both the first and second editions of Black's Law Dictionary carry identical entries for this term, word for word, each citing Reg. Orig. 270 as the sole authority. Neither edition elaborates beyond identifying the writ as obsolete, addressed to a corporation, and directed at weighing licensed export wool at a haven. The duplication across editions without revision or expansion signals that no additional authorities were located between editions and that the term had no contemporary legal significance warranting fresh analysis.
Both editions correctly characterize the writ as obsolete. Neither attempts to situate it within the broader history of the English wool trade, the staple system, or the role of the Registrum Omnium Brevium — context that would be useful to researchers but that the dictionary format did not demand. No other standard historical legal dictionaries appear to have treated this term independently.
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Jurisdictional Note
Purely English in origin and application. The writ has no counterpart in American law and no analog in Scots or Irish common law practice. It is irrelevant outside the context of medieval and early modern English legal history.
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