Definition
De manucaptione (also rendered "writ of manucaption" or "writ of mainprise") is a historical common law writ that directed a sheriff to release a prisoner charged with felony who had offered sufficient bail but had been unlawfully refused. The writ compelled the sheriff to discharge the detainee upon the prisoner's finding adequate mainpernors — sureties who undertook personal responsibility for the accused's appearance — where the refusal of bail was without lawful justification.
The writ was a procedural remedy against arbitrary pre-trial detention, operating in the space between arrest and trial when the ordinary bail process had broken down or been improperly denied.
Common Confusion
De manucaptione is closely related to, but distinct from, the writ of habeas corpus and the writ of mainprise generally. Habeas corpus challenges the lawfulness of detention itself and commands production of the prisoner before a court. De manucaptione did not contest the lawfulness of the underlying arrest; it addressed only the sheriff's improper refusal to accept adequate sureties once offered. Mainprise, as a broader concept, refers to the suretyship arrangement itself — the agreement by mainpernors to produce the accused. De manucaptione was the specific writ that enforced a prisoner's entitlement to that arrangement when it had been wrongfully withheld.
Why It Matters in Research
This term is encountered almost exclusively in pre-modern English common law materials and in American legal dictionaries that preserve the Latin writ vocabulary of English practice. Researchers should be aware of several navigational points.
First, the writ is obsolete in modern practice. No jurisdiction currently employs de manucaptione as an operative remedy. Its importance is historical: it represents an early articulation of a right to bail and a mechanism for judicial control over executive detention, making it relevant to research on the constitutional history of bail and the Eighth Amendment's excessive bail clause, as well as English antecedents to the Bail Reform Act framework.
Second, the term appears in Law Latin form in primary sources, and its anglicized equivalents — "writ of manucaption" and "writ of mainprise" — are used interchangeably in historical treatises without consistent distinction. Searching only the Latin form will miss substantial discussion under the English variants.
Third, the writ connects to the broader medieval and early modern English suretyship system. Research into de manucaptione will quickly intersect with mainprise, mainpernors, and the distinctions between mainprise and bail — distinctions that mattered in English practice (mainpernors were jointly and severally liable for the accused's appearance, while bail created a different kind of surety obligation) but that collapsed into the modern unified bail concept.
Fourth, American legal dictionaries preserve this term largely as a matter of completeness and English common law heritage. It had limited direct application in American courts even at the Founding, where habeas corpus became the dominant vehicle for challenging unlawful pre-trial detention.
Historical Dictionary Support
Both editions of Black's Law Dictionary provide substantively identical definitions: a writ lying for a prisoner charged with felony who had offered bail that was refused, commanding the sheriff to discharge the prisoner upon finding sufficient mainpernors or bail. Both editions cite Reg. Orig. 268 (the Registrum Omnium Brevium, the standard English register of writs) and Fitzherbert's Natura Brevium 249 — the two principal sources for original writ practice in English common law.
The entries are brief and technical, as befits a writ that had become a historical artifact even by the time Black's first edition appeared. Neither edition discusses the writ's procedural history, its relationship to habeas corpus, or its decline. Researchers relying solely on Black's will obtain an accurate but skeletal account. For fuller treatment, the Registrum Omnium Brevium and Fitzherbert's Natura Brevium remain the foundational primary sources, supplemented by Blackstone's Commentaries on pre-trial detention and suretyship.
The first edition's source block contains a typographical fragment ("de malo veniendi," "de malo villa") from an adjacent entry that crept into the transcription — this is an artifact of the original print layout and does not belong to the de manucaptione entry.
Jurisdictional Note
De manucaptione was an instrument of English common law with no surviving direct equivalent in any American jurisdiction. Its conceptual legacy — judicial oversight of a sheriff's or magistrate's refusal of bail — is absorbed into modern habeas corpus practice and statutory bail review procedures, which vary significantly by state.