Definition
FAB is a mnemonic device appearing in medieval English legal practice, derived from an artificially composed Latin couplet used as a memory aid to identify categories of nuisances subject to presentment before the king's itinerant justices. The couplet — reconstructing the words *fur, porta, domus, vir, gur, mo, murus, ovile, Et pons* — encoded the types of nuisances (and related matters) that were to be delivered or reported to the sheriff. FAB itself is not a standalone substantive legal term but a fragment or abbreviated reference to this mnemonic tradition.
In this historical context, FAB functions as a classifier within the law of nuisances, signaling that certain physical conditions — walls, bridges, folds, gates, and similar structures — fell within the administrative oversight exercised during the eyre, the circuit journey of the king's justices.
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Common Language
Modern common usage (Wiktionary): A manufacturing plant that fabricates items, particularly silicon chips.
Historical common usage (Webster's 1913): Not attested as a standalone entry; "fab" derives from "fabricate" or "fabulous" in common speech.
The gap here is total. The modern reader encountering FAB in a legal dictionary context will find nothing that connects to fabrication or manufacturing. The legal usage is a purely historical artifact of mnemonic jurisprudence, untethered from any ordinary English meaning of the word.
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Why It Matters in Research
Researchers will encounter FAB almost exclusively in early English legal sources — particularly materials relating to the eyre, the Articles of the Eyre, and treatises such as Britton. The term is not a term of art in modern law and does not appear in contemporary statutes, case reporters, or standard legal encyclopedias.
The primary research trap is treating FAB as a discrete legal concept rather than as a reference point within a larger mnemonic system. Burrill's entry situates it alongside cross-references to *extunc*, *eire*, and related procedural vocabulary of the itinerant justice system. A researcher working backward from FAB should pursue those cross-references rather than treating the abbreviation in isolation.
Jurisdictional reach is effectively nil outside the historical English common law tradition. Researchers in American colonial law or early common law reception will find the term unhelpful unless tracing the deep roots of nuisance doctrine or the administrative machinery that preceded fixed royal courts.
Because Burrill reproduces the Latin couplet in full, the entry is most valuable as a philological key: the couplet itself (*fur, porta, domus, vir, gur, mo, murus, ovile, Et pons*) maps the categories — theft, gate, house, man, gurges (weir or pool), mill(?), wall, sheepfold, and bridge — that itinerant justices were to investigate. FAB appears to derive from or abbreviate elements of this sequence, serving memory rather than doctrine.
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Historical Dictionary Support
Burrill's Law Dictionary is the sole shelf source with a relevant entry, and even there the treatment is oblique — FAB appears embedded within a cluster of Latin cross-references rather than as a headword commanding its own full definition. Burrill cites Britton (c. 2) and the Registrum Originale for contextual support, situating the term squarely in the procedural world of the eyre.
No other standard historical law dictionaries — not Jacob's, not Tomlin's, not Black's early editions — carry FAB as an independent entry, which itself signals the term's marginal status even within legal scholarship. It is a relic of mnemonic pedagogy rather than a working legal concept, preserved in dictionaries primarily as a philological curiosity and as an entry point to the broader vocabulary of the itinerant justice system.
The absence of FAB from later dictionaries is informative: as the eyre fell into disuse and nuisance doctrine was systematized through common law pleading and equity, the mnemonic apparatus that generated terms like FAB became obsolete. Researchers should not expect to trace FAB into 17th-century or later sources.
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Jurisdictional Note
FAB is specific to the medieval English common law system organized around the eyre. It has no recognized equivalent in Scottish, continental, or American legal traditions and does not survive as a working term in any modern jurisdiction.
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Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Nuisances (Historical); Eyre; Articles of the Eyre.
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