Definition
A Latin phrase meaning "in equal hand" or "with an equal hand." In its legal usage, the phrase describes a condition of impartiality or equality between parties, particularly in the context of holding or delivering something without favor to either side. It suggests that a person acting in aqua manu stands in a position of neutrality — neither tilting toward one party nor the other when handling property, evidence, or an obligation.
The phrase appears in early medieval English legal writing as a descriptor of equitable or balanced conduct, most prominently in contexts involving custody or delivery of goods, where a neutral third party holds an item pending resolution of a dispute or obligation.
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Why It Matters in Research
This term appears only at the margins of the historical record and is rarely encountered outside of early common law sources. Researchers encountering it in period texts should treat it as a descriptive phrase rather than a term of formal art with a settled doctrinal definition. It does not correspond to a recognized cause of action, defense, or procedural mechanism in modern law.
The primary research trap is orthographic: the phrase has been recorded in variant spellings across manuscripts and printed editions. Black's 2nd Edition Supplemental identifies it as "in ajqua manu," which reflects a transcription or typeface artifact — the letter "j" substituting for "i" in the Latin "aequa," a common occurrence in early printed legal texts where the letters i and j were not consistently distinguished. Researchers searching period indexes or databases should run variants including "in aequa manu," "in æqua manu," "in aqua manu," and "in ajqua manu" to capture the full range of appearances.
The sole cited authority in the historical dictionaries is Fleta, a late thirteenth-century Latin legal treatise of uncertain authorship, closely modeled on Bracton. Fleta, Book 3, Chapter 14, is the reference point Black's provides. Because Fleta is a highly specialized primary source not widely indexed in modern legal databases, researchers relying on digital full-text search are unlikely to surface it through keyword queries alone. Consultation of the printed Selden Society edition of Fleta is advisable for anyone who needs to trace this phrase to its textual origin.
The phrase should not be confused with the modern Latin legal vocabulary around "aequitas" (equity) or the procedural concept of an impartial stakeholder, though conceptual overlap exists with the latter. It carries no direct doctrinal lineage into interpleader or stakeholder proceedings as those were later systematized.
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Historical Dictionary Support
Black's Law Dictionary (2nd Edition, Supplemental) provides the only historical dictionary entry identified for this term. The definition is spare — "in equal hand" — with a single citation to Fleta, lib. 3, c. 14, f. 2. No additional elaboration is offered, and the term does not appear in the main body of Black's 2nd Edition, confirming its status as a peripheral phrase rather than a term in regular doctrinal use.
No entry for this phrase appears in Bouvier's Law Dictionary, Tomlin's Law Dictionary, or Burrill's Law Dictionary, which further establishes that it did not achieve the currency of a recognized legal term of art in the Anglo-American tradition. Its presence in Black's Supplemental suggests it was flagged for completeness as a phrase encountered in the Fleta text, rather than because it carried independent legal significance.
The Fleta reference itself is instructive. Fleta was composed circa 1290–1300 and reflects the procedural and substantive law of that period. Its language on equal-handedness in that chapter relates to conduct expected of parties or officers in handling obligations — a concern that maps loosely onto later equity jurisprudence but was not formalized as a distinct doctrine under this phrase.
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Jurisdictional Note
This phrase has no recognized jurisdictional application in modern common law systems. Its relevance is confined to historical English legal texts of the late medieval period and to scholarly analysis of those sources.
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