Definition
De medio (Latin: "of the middle") is an obsolete writ in the nature of a writ of right, available to a tenant paravail — the lowest tenant in a chain of subinfeudated holdings — who had been distrained by a lord paramount for rent that was actually owed by the mesne (middle) lord. The writ compelled the mesne lord to perform his obligations upward in the feudal chain, protecting the under-tenant from bearing the cost of a superior lord's debt.
To understand the writ, the feudal structure it presupposes must be understood. Under subinfeudation, a tenant holding land from a lord paramount could carve out a lesser tenancy and become himself a lord to a tenant below him — the mesne lord. The mesne lord owed rent to the lord paramount. The tenant paravail owed obligations to the mesne lord. When the mesne lord failed to pay, the lord paramount might distrain upon whoever was actually in possession of the land — the tenant paravail — because distraint ran with possession of the land, not with personal obligation. De medio was the tenant paravail's remedy: a writ to compel the mesne lord to acquit the under-tenant of that superior demand.
The writ belongs to the family of real actions — the writs of right and their cognates — and like virtually all real actions it became obsolete in English law well before its formal abolition. It has no functional modern equivalent and no application in American law.
Why It Matters in Research
De medio matters in research almost exclusively as a signpost. If you encounter the term in a historical source, it signals that the surrounding text is analyzing the structure of feudal tenure, the hierarchy of obligations in subinfeudated estates, or the taxonomy of medieval real actions. It is not a writ that crossed to American colonial practice in any operative form; American land law rejected subinfeudation's framework early and thoroughly.
Researchers working in English legal history should note the tight relationship between de medio and the Statute of Quia Emptores (1290), which prohibited further subinfeudation in England. Quia Emptores did not immediately extinguish existing mesne tenures already in place, but it stopped new ones from forming, which meant de medio's practical scope contracted steadily after 1290. By the time of the early modern abridgments and dictionaries, the writ was already a creature of antiquarian interest.
The writ also appears in discussions of distraint, where the structural injustice it addressed — that distraint ran with land possession rather than personal obligation — illustrates why the common law developed collateral remedies alongside the rigid real action framework. Researchers tracing the history of landlord-tenant remedies or the evolution of distress may encounter de medio as background context.
Because both editions of Black's cite Booth's Real Actions (1701) as authority, that treatise is the primary historical source for anyone needing more than the dictionary gloss. The citation "Booth, Real Act. 136" refers to William Booth's work on real actions, which provides the most accessible English-language treatment of the writ in the post-medieval period.
Historical Dictionary Support
Black's Law Dictionary (1st and 2nd editions) give identical definitions, both tracing directly to Booth. The consistency across editions reflects that no development of the term was possible: it was already frozen as a historical artifact when Black's was first compiled. Neither edition contextualizes the writ within the broader collapse of real actions or notes Quia Emptores as the structural turning point, which is a meaningful gap for the researcher who encounters the term without background in feudal tenure.
The definition in both editions accurately describes the functional mechanics of the writ — subinfeudation, mesne lord, tenant paravail, distraint by lord paramount — and the characterization as a writ "in the nature of a writ of right" is the standard classification. No divergence between editions exists; this is one of the cleaner cases where both Black's entries are simply reprints of the same passage.
Jurisdictional Note
De medio is a term of English feudal law with no operative jurisdiction in any American state. It appears in American legal dictionaries for completeness of coverage of real actions, not because it was received into American practice.
Encyclopedia Cross-Reference
No direct match. For related feudal and tenure concepts that provide necessary background, researchers may find context in The Law Mind Business Organizations & Corporate Law Encyclopedia: Corporate Formation — Defective Incorporation (De Facto, Corporation by Estoppel) useful only for understanding the broader use of Latin "de" constructions in law. That entry does not address feudal tenure.