Definition
A Latin term from medieval English law meaning to cross a strait — specifically, to cross the Strait of Dover between England and the continent. The term appears in old English legal records and writs in connection with royal licensing requirements for travel abroad. The phrase licentia transfretandi (liberty to cross the strait) identifies the formal permission that subjects required before making such a crossing.
Why It Matters in Research
This term is primarily a navigational marker for researchers working in medieval English administrative and procedural records. It appears in the Registrum Brevium (Register of Writs) and in Fleta, placing it within the formal writ-based legal apparatus of the 13th and 14th centuries. Researchers encountering it in manuscript rolls, chancery records, or early plea rolls should understand it as a licensing or administrative term rather than a substantive legal concept in the modern sense.
The requirement of royal permission to leave England — enforced in part through writs touching on transfretare — reflects the medieval crown's control over the movements of subjects, particularly landholders, officials, and litigants. A party who left the realm without proper license could find procedural consequences waiting on return: Burrill's entry flags that a person who crossed without appropriate standing could be afterwards precluded from availing himself of pre-existing matter that might have been raised in bar of a recovery. This procedural consequence is the term's most practically significant legal dimension and the detail most likely to matter in researching a specific dispute.
Because the term is almost entirely confined to Latin-language sources from the medieval period, researchers should not expect to encounter it in post-medieval common law reports or statutes. It is a term of the ius commune administrative layer of English law, not of the common law's doctrinal tradition. Searches in Law Mind sources should be directed toward the Registrum Brevium, Fleta, and related chancery materials rather than toward Year Books or equity reports.
Historical Dictionary Support
Burrill is the principal English-language legal dictionary source for this term, and his treatment is brief but precise. He gives the Latin derivation (trans, across, and fretum, a strait), identifies the specific geographic referent (the Strait of Dover), and cites both the Registrum Brevium (Reg. Orig. 193b) and Fleta (lib. 4, c. 5, § 17) as the primary authorities. The procedural consequence Burrill notes — preclusion from raising pre-existing bar matter — appears embedded in the entry without extended analysis, suggesting it was included as a practical gloss drawn from the writ practice context rather than as a stand-alone doctrine.
No other major historical legal dictionary in common use (Jacob's, Tomlin's, Black's early editions) gives this term substantive treatment, which reinforces its status as a narrow term of art from medieval administrative law with no significant common law afterlife. The Burrill entry is therefore the definitive stopping point for standard dictionary research; substantive inquiry must move directly to primary sources.
Jurisdictional Note
This term is specific to medieval English law and its licensing regime for cross-Channel travel. It has no recognized counterpart or parallel development in Scots law, Welsh law, or continental civil law systems for purposes of English legal research.