Definition
A highly localized ancient tenure custom recorded in a borough within Herefordshire, England, under which thirty burgesses each paid one penny in rent for their houses to the bishop, who held the manor as lord. The term derives from the Latin for "thirtieth" and functions as a proper designation for this specific arrangement rather than a general category of tenure or payment obligation. It does not describe a class of obligations but a singular, named local custom.
Why It Matters in Research
TRICESIMA is an extreme example of highly localized medieval custom that resists generalization. Researchers encountering this term in historical land records, tenure surveys, or ecclesiastical property disputes should treat it as a geographic and institutional proper noun rather than a transferable legal concept. It will not appear in general treatises on English land law or tenure doctrine; its relevance is confined to records touching Herefordshire borough lands held under the Bishop of Hereford's manorial authority.
The term surfaces in sources dealing with burgage tenure and borough custom, but it is not itself a form of burgage tenure in the doctrinal sense — it is a named payment arrangement attached to a specific place and landlord. Researchers working in early English local history, ecclesiastical manorial records, or Domesday successor surveys may encounter it; those working in general common law doctrine will not.
A key research trap: the numerical logic of the term (thirty burgesses, one penny each) may tempt a researcher to treat "tricesima" as a formula applicable elsewhere. There is no evidence in the source record that it was. Do not import it into analyses of other episcopal boroughs or analogous penny-rent arrangements without independent documentary support.
The Liber Nibaldi Herefordensis (Lib. Nik. Heref.) cited by Rapalje & Lawrence is the most proximate primary source. Researchers seeking to go deeper should consult that record directly rather than relying on the dictionary glosses, which are themselves secondary to it.
Historical Dictionary Support
All three source dictionaries — both editions of Black's and Rapalje & Lawrence — are in complete agreement on the substance of this entry, which is itself a signal: the term had no contested meaning, no doctrinal evolution, and no competing definitions to reconcile. Each reproduces essentially the same formulation, tracing back to Wharton's Law Lexicon and, behind that, to the Lib. Nik. Heref.
The unanimity of the sources reflects the term's narrow scope rather than its legal importance. None of the dictionaries attempt to generalize from this custom to broader principles, and none connect it to related tenure doctrine. This silence is informative. The historical dictionaries treat TRICESIMA as a curiosity worthy of record but without doctrinal weight — a local usage preserved for completeness rather than active legal utility.
What the historical sources miss: they provide no date range for the custom, no information about whether the obligation survived into later centuries, and no discussion of whether the thirty-burgess figure had any constitutional or charter-based significance in the borough's governance. Researchers wanting that context must go beyond the dictionary literature entirely.
Jurisdictional Note
TRICESIMA is specific to a single borough in Herefordshire, England, and has no known application outside that locality. It has no equivalent in American, Scottish, or other common law jurisdictions. Researchers outside English local history have no practical use for this term.