Definition
An archaic Scots criminal law term meaning accessory; one who contrives and participates in a criminal act. The phrase describes a person who is both an instigator and a sharer in the commission of a crime — equivalent to what modern law would recognize as a co-principal or joint participant in criminal liability.
AIRT AND PAIRT is the older orthographic form of the term now standardly written as ART AND PART (q.v.), which remains a living doctrine in Scots law. The two forms are identical in meaning; the shift reflects the general modernization of Scots legal spelling over the seventeenth and eighteenth centuries.
Common Confusion
AIRT AND PAIRT is not merely a synonym for "accessory" in the modern sense. The term encompasses both the person who contrives or instigates the crime and the person who participates in its execution — categories that in English law are often treated as distinct (principal in the first degree, principal in the second degree, accessory before the fact). Under the art and part doctrine, all such participants may bear equal criminal liability without the hierarchical distinctions English law historically imposed. Researchers applying English common law categories of accessorial liability to Scots sources using this term will misread the doctrine.
Why It Matters in Research
This term appears almost exclusively in pre-nineteenth-century Scots criminal records and trial reports. Researchers encountering AIRT AND PAIRT in historical sources should treat it as a flag pointing to the art and part doctrine rather than to English accessorial liability principles.
The primary research trap is conflation with English complicity law. When reading Scots indictments, criminal trial records, or legal commentary that use this phrase, do not import the principal/accessory hierarchy of English law. The Scots doctrine, then and now, proceeds from a different premise: all who participate in a common criminal purpose may be held equally liable as if each had committed the act personally.
The spelling variation itself is a navigational issue. Historical Scots legal documents are inconsistent — AIRT AND PAIRT, ART AND PART, and intermediate spellings appear across the same period. A search limited to one form will miss relevant records. The primary sources cited in the dictionaries (Pitcairn's Criminal Trials and Howell's State Trials) use the older form; later commentary uniformly adopts the modernized spelling.
Because AIRT AND PAIRT survives in the corpus only as a historical form, any research involving the living doctrine must pivot immediately to ART AND PART and to modern Scots criminal law sources. The two dictionary entries are the beginning of the research path, not the end of it.
Historical Dictionary Support
All three source dictionaries — Black's (1st and 2nd editions) and Burrill — give virtually identical entries, and all three direct the researcher to the modernized form ART AND PART. The consensus is complete: this term is historical, the doctrine it names is living, and the spelling is obsolete.
Black's 2nd edition reproduces the same definition as the 1st with only minor typographic differences (a page reference discrepancy of p. 133 versus p. 138 appears to reflect copying variation rather than a substantive distinction). Burrill's entry is likewise derivative, adding nothing beyond the same two citations.
The cited authorities — Pitcairn's Criminal Trials (the standard collection of early Scots criminal proceedings) and Howell's State Trials (volume 3) — are the underlying primary sources all three dictionaries draw from. No dictionary in this set attempts to elaborate on the doctrine itself; all three treat AIRT AND PAIRT as a historical pointer to ART AND PART and nothing more. Researchers should not rely on these entries for substantive analysis of the doctrine; they are identification entries only.
Jurisdictional Note
This term is specific to Scots law and has no counterpart in the English common law tradition. It does not appear in Irish, colonial American, or other legal systems derived from English common law. Research involving Scots criminal law of any period — historical or modern — requires awareness that the underlying art and part doctrine differs structurally from English joint enterprise and accessorial liability frameworks.
Encyclopedia Cross-Reference
See Art and Part