Definition
A fosdike is a historical English term for an artificial canal or navigable waterway constructed by royal authority. Specifically, the term refers to a particular canal approximately seven miles in length made by King Henry I in Lincolnshire, connecting to the River Trent. By extension, the term appears in early English water law and sewer law as a descriptor of royal or public artificial watercourses.
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Why It Matters in Research
Fosdike is an entry-specific historical term that researchers will encounter almost exclusively when working with early English water law, drainage law, or treatises on the law of sewers — particularly sources predating the nineteenth century. Its primary significance in the Law Mind corpus is contextual: the term anchors discussions of royal prerogative over navigable waters and the jurisdiction of Commissioners of Sewers over artificial waterways.
Researchers tracing the development of riparian rights or public navigation rights in early English law should treat Fosdike as a marker pointing toward the broader body of sewer and drainage law, not as a term with ongoing doctrinal use. The term essentially disappears from active legal vocabulary after the early modern period. Encountering it in a source should prompt the researcher to look for surrounding discussion of the Statute of Sewers (1531) or Callis's treatise, both of which defined the administrative and legal framework governing waterways of this type.
Do not expect Fosdike to appear in American legal sources. It has no transplanted doctrinal life in common law jurisdictions outside England, and even within English law it ceased to function as a living legal term well before the modern era.
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Historical Dictionary Support
Burrill's Law Dictionary is the sole historical dictionary source for this entry, and its treatment is brief and topographical rather than doctrinal. Burrill identifies the Fosdike as a canal of seven miles constructed by Henry I in Lincolnshire leading to the River Trent, citing Callis on Sewers at pages 81 and 101, and cross-referencing Cowell under the heading "Fossatum."
The reference to Callis on Sewers — the seventeenth-century treatise by Robert Callis on the law governing drainage and waterways — is the key navigational clue. Callis uses the Fosdike as an illustrative example of a royal artificial watercourse subject to the jurisdiction of Commissioners of Sewers. The cross-reference to Cowell's Interpreter under "Fossatum" (the Latinized term for a ditch or trench) confirms the term's roots in medieval Latin administrative vocabulary.
No other standard historical legal dictionaries — including Jacob's Law Dictionary, Tomlin's, or Black's early editions — carry a substantive entry for Fosdike. Its appearance in Burrill reflects Burrill's broader ambition to capture historical and archaic terms that other dictionaries left to one side. Researchers should treat the Burrill entry as a pointer to primary sources, not as a doctrinal definition.
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Jurisdictional Note
Fosdike is exclusively an English legal-historical term tied to a specific geographic feature in Lincolnshire and to early English water law. It has no recognized application in American, Scottish, or other common law jurisdictions.
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