Definition
"Hyl" appears in Burrill's Law Dictionary as a corrupt or variant form of the Law French pronoun "il," meaning "he" or "it." It is not a substantive legal term in its own right but rather a paleographic and linguistic artifact — a documented scribal or phonetic corruption found in Anglo-Norman legal manuscripts and records. Its practical significance is confined to the reading and interpretation of historical legal documents written in Law French.
Common Confusion
Do not conflate "hyl" with the unit of mass defined in physics contexts (the "hyl" or "metric slug," equivalent to approximately 9.80665 kilograms), which derives from Greek "hyle" (matter). That usage is entirely unrelated to Law French and has no legal significance. The phonetic similarity is coincidental.
Why It Matters in Research
Researchers working with medieval and early modern English legal records — plea rolls, Year Books, and similar manuscript sources — will encounter Law French in its many degraded and dialectally irregular forms. "Hyl" as a corruption of "il" is precisely the kind of variant that can stall transcription or cause misreading if the researcher does not recognize it for what it is: a pronoun, not a term of art.
Burrill flags this form with a citation to Kelham's dictionary of Norman French, which remains a useful companion source for Law French vocabulary in any serious archival project. A researcher who encounters "hyl" in a manuscript and does not recognize the corruption may search fruitlessly for a substantive legal meaning that does not exist, or may misparse a sentence entirely.
The broader lesson for corpus research is that Law French as preserved in English legal records was never standardized. Spelling and phonetic rendering varied by scribe, region, and period. Apparent "terms" in older indices and digests sometimes reflect scribal habit rather than legal doctrine. When Burrill includes an entry like this one, he is performing a service to the manuscript reader, not defining a doctrine.
Historical Dictionary Support
Burrill's treatment is minimal by design: he defines "hyl" solely as a corrupt form of "il" and directs the reader to that primary entry, with the sole authority being Kelham. This is appropriate — there is nothing more to say doctrinally. The entry's value is entirely practical and philological.
Notably, Burrill pairs this entry on the same page with "HYPOBOLON" (a civil and feudal law term for an addition to a widow's dowry beyond her dower portion), which is a substantive legal concept with real doctrinal content. The juxtaposition illustrates Burrill's inclusive editorial method: he treated Law French linguistic variants and Roman-derived legal terms as equally worthy of inclusion, on the theory that a legal researcher could encounter either and need assistance.
No other major English legal dictionary (Black's, Bouvier's, Tomlin's) carries an entry for "hyl," which confirms its status as a narrow manuscript-reading aid rather than a term with wider legal currency.