Definition
Pensa is a Latin term used in old English legal and administrative records in two distinct senses:
1. A weight, or unit of weight, particularly as applied to monetary payment. In exchequer practice, payment ad pensam (by weight) meant tendering silver such that each pound sterling equaled twelve ounces troy in actual weight — a standard distinct from, and more exacting than, simple coin count.
2. In old manorial and commercial records, a pensa designated a wey (or weigh) of salt or cheese, equivalent to 256 pounds. This was a fixed bulk measure used in commodity transactions and rental obligations.
The term derives from the Latin pendere, to weigh, and carries no technical meaning in modern law.
Common Language
Modern common usage (Wiktionary): No current English entry. The term is not in active common use.
Historical common usage (Latin): In classical and late Latin, pensa (from pendere) carried the sense of a weighed portion or daily ration — attested in Diocletian's Edict on Maximum Prices as a measured allowance of provisions.
The gap here is narrow but worth noting for researchers: the Latin root sense of a rationed or weighed daily portion influenced both legal uses — the exchequer weight standard and the commodity measure — but neither maps precisely onto the classical provisioning sense. The legal meanings are technical measurements fixed by custom, not rationing concepts.
Recognized Forms
/SUBTYPES
Ad pensam — Payment by weight into the exchequer, as opposed to payment de numero (by count). The distinction mattered because coin could be debased or clipped; payment ad pensam required the silver to meet an actual weight standard of twelve troy ounces per pound sterling, protecting the crown against underweight tender.
De numero — The contrasting mode: payment by count of coins, without regard to actual weight. Researchers will encounter both terms together in exchequer and fiscal records.
Pensa as commodity measure — The 256-pound wey of salt or cheese. This sense appears in manorial surveys, farm accounts, and rental records, not in fiscal or monetary contexts.
Why It Matters in Research
Researchers encounter pensa almost exclusively in two archival contexts: exchequer records and manorial documents. Conflating the two meanings is an easy error because both turn on the idea of weight, but they operate in entirely different legal registers — one fiscal and one agrarian.
In exchequer records, the ad pensam standard is a signal of monetary integrity concerns. Its appearance marks periods or transactions where the crown was specifically requiring weight-verified payment rather than accepting coin at face value. This has implications for dating documents and understanding fiscal policy at the time of drafting.
In manorial and estate records, pensa as a wey of 256 pounds is a local commodity measure. Researchers should note that "wey" itself varied by region and commodity in medieval England — the 256-pound figure given by Cowell is the value recorded for salt and cheese specifically, and should not be assumed to apply to other goods without corroboration from the specific record's context.
The term appears infrequently enough that it will not be indexed under standard legal headings in most finding aids. Searches in Latin-language manuscript records may need to account for inflected forms (pensam, pensae, pensas).
Historical Dictionary Support
Burrill's Law Dictionary is the sole historical legal dictionary source here, and its entry is compact but reliable. Burrill draws directly on Cowell's Interpreter for both meanings and cites Lowndes' Essay upon Coin for the twelve-ounce troy standard, giving the entry traceable scholarly grounding.
What the historical dictionaries do not address: the classical Latin provisioning sense (attested in Diocletian's Edict) is absent from Burrill entirely, which is appropriate given that sense never acquired English legal currency. Researchers working on Byzantine or Continental sources, however, should be aware that pensa in those contexts may carry the ration-or-allowance meaning rather than either of the English legal senses.
Burrill's treatment is representative of the 19th-century legal lexicographers' approach to obsolete Latin terms: accurate as far as it goes, but confined to the English common law tradition without engagement with comparative or Continental usage.
Jurisdictional Note
Pensa as a legal term is specific to English legal and fiscal history. It does not appear as a technical term in Scots law, canon law, or civil law traditions in the senses Burrill records. Researchers working in non-English archival sources should treat the term with caution and verify meaning against the specific legal tradition of the document.