Definition
The act by which a person accused of a crime cleared themselves of guilt, not through adversarial trial, but through oath-taking, the supporting oaths of neighbors or compurgators, or by submitting to physical ordeal. Purgation operated as a formal legal procedure in English ecclesiastical and common law courts, functioning as an alternative to or substitute for ordinary criminal trial.
Two principal forms existed:
1. Canonical purgation: The accused appeared before an ecclesiastical court, swore an oath of innocence, and was supported by a fixed number of compurgators — typically twelve — who swore not that the accused was innocent, but that they believed his oath to be truthful. This procedure was prescribed by canon law and remained in use in the spiritual courts well after common law courts had moved away from it.
2. Vulgar purgation: An earlier and ultimately condemned form involving physical ordeal — trial by fire, water, or combat — through which innocence was determined by surviving or succeeding in a prescribed test. This mode was repudiated by the Catholic Church at the Fourth Lateran Council in 1215 and fell away from recognized legal procedure thereafter.
Common Language
Modern common usage (Wiktionary): The process or act of purging; cleansing from sin or guilt; exoneration or the act undertaken to achieve exoneration.
Historical common usage (Webster's 1913): The act of clearing oneself from a crime of which one was publicly suspected and accused; also, the evacuation of the bowels; the act of cleansing or purifying by removing impurities.
The common meaning of purgation — cleansing, whether physical or moral — overlaps with the legal meaning but obscures the precise procedural mechanism. In legal usage, purgation was not a general moral clearing but a structured, formally constituted legal act with defined requirements: a specific oath, a specific number of supporting witnesses, and jurisdiction before a recognized court. A researcher encountering the word in a non-legal text cannot assume the legal procedure is intended.
Common Confusion
Purgation and compurgation are closely related but distinct. Compurgation refers specifically to the method of oath-helping — the procedure by which compurgators supported the accused's denial. Purgation is the broader act of self-clearing, of which compurgation was one instrument. Canonical purgation used compurgation; vulgar purgation did not. The terms are sometimes used interchangeably in older sources, but precision requires treating purgation as the overarching procedure and compurgation as the oath-helping mechanism within it.
Recognized Forms
/SUBTYPES
Canonical purgation: Governed by canon law; conducted in ecclesiastical courts; required the accused's own oath plus twelve compurgators swearing to their belief in his truthfulness.
Vulgar purgation: Trial by ordeal; governed by custom and ecclesiastical sanction prior to 1215; included ordeal by fire, ordeal by water, and trial by combat. Formally condemned by the Church at the Fourth Lateran Council and subsequently abandoned.
Why It Matters in Research
Purgation is a term almost entirely historical in legal operation. No researcher will encounter it as live doctrine, but it appears with meaningful frequency in three research contexts:
First, ecclesiastical court records. Purgation proceedings survived in English spiritual courts — consistory courts, archdeaconry courts — well into the early modern period. Researchers working with church court records from the medieval through seventeenth-century periods will find purgation orders and outcomes recorded as formal judicial acts.
Second, benefit of clergy cases. The intersection of purgation and benefit of clergy is significant. Clergy claiming benefit of clergy could be transferred to ecclesiastical jurisdiction, where purgation rather than criminal punishment might follow. Understanding purgation is necessary to tracing what actually happened to defendants who successfully claimed clergy.
Third, the transition to oath and witness-based procedure. Purgation's decline tracks the development of the jury system and modern evidentiary standards. Comparative legal historians treat purgation as a reference point for understanding how guilt and innocence came to be determined in the common law tradition. Sources treating this transition — Pollock and Maitland, Maitland's Domesday Book and Beyond, and Lea's Superstition and Force — use purgation as an analytic concept rather than a term of current law.
A terminological trap: older texts sometimes use "purgation" loosely to mean any exoneration or acquittal. Read in context. The formal legal procedure and a casual usage of the word must be distinguished when evaluating the significance of a historical source.
Historical Dictionary Support
The historical dictionaries are consistent on core definition and substantially identical in phrasing, suggesting a shared lineage running through Blackstone and Cowell. Burrill's acknowledges this explicitly, citing Cowell directly. Black's first and second editions track Rapalje and Lawrence closely on the canonical/vulgar distinction.
What the historical dictionaries do not address: the jurisdictional shift that effectively ended canonical purgation in English practice, the role of the Fourth Lateran Council in ending vulgar purgation, and the relationship between purgation's decline and the rise of jury trial. These are critical for understanding why the term appears where and when it does in the corpus, and the dictionaries treat it as static doctrine rather than an institution with a historical arc.
Burrill's entry is the most complete of the available sources, linking the Latin purgatio and citing Blackstone's Commentaries as the explanatory authority. Rapalje and Lawrence add the useful note that purgation required the accused to have been "publicly suspected and accused before a judge" — a reminder that the procedure was not self-initiated but was court-ordered or court-supervised.
Jurisdictional Note
Purgation was operative in English ecclesiastical and common law courts. It did not transplant to American law in any functional sense — American courts inherited the post-purgation common law tradition. Researchers working in colonial records may occasionally encounter references to purgation-like procedures in ecclesiastical or quasi-ecclesiastical contexts, but these are exceptional and should be evaluated against the specific colony and period.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Compurgation; Benefit of Clergy; Ecclesiastical Courts; Ordeal