Definition
Letters of slains (also written letters of slayns) are formal written documents, historically used in Scots law, by which the relatives of a person who had been killed acknowledged receipt of compensation from the killer or the killer's family and declared their forgiveness of the homicide. By granting letters of slains, the deceased's kin renounced any further private right of vengeance or civil action arising from the killing and consented to the killer's application for a royal pardon. The documents functioned as a prerequisite to — or accompaniment of — a formal remission from the Crown, without which the killer remained at risk of private retaliation and could not safely obtain a pardon.
In essence, letters of slains represent the private, consensual half of a two-part resolution to a homicide: the kin's forgiveness operated alongside the sovereign's mercy. Neither alone was fully sufficient — the Crown's pardon did not extinguish the family's claim, and the family's consent did not by itself lift criminal liability.
Common Confusion
Letters of slains are sometimes loosely compared to letters of remission, but the two instruments are distinct. Letters of remission issued from the Crown and represented the sovereign's formal pardon of the criminal offense. Letters of slains, by contrast, issued from the victim's kin and represented the private party's release of any claim arising from the death. The two typically operated together but came from entirely different sources and served entirely different legal functions. Conflating them in historical research produces errors in understanding both the criminal process and the private settlement dynamic in early Scots law.
Letters of slains also bear superficial resemblance to letters of safe conduct (documents granting protection for travel or commerce), but the two share only the epistolary form. They should not be confused in archival research.
Why It Matters in Research
This term is almost exclusively a Scots law phenomenon and will rarely appear in English common law sources or American legal materials. Researchers working in the Law Mind corpus should expect to encounter it in:
— Scottish legal history materials, particularly sources dealing with the Scots criminal law of the medieval and early modern periods (roughly 14th through 17th centuries);
— Comparative discussions of the wergild or blood-money tradition and its transformation into formalized legal instruments;
— Historical treatments of pardon procedure, royal remission, and the relationship between private composition and public punishment.
The key research trap is anachronism. Modern readers may instinctively frame letters of slains within contemporary concepts of civil settlement or victim-offender mediation. The analogy is instructive but imprecise: letters of slains operated within a legal culture that had not yet sharply separated criminal prosecution from private vengeance, and the kin's role was not merely that of a civil plaintiff but of a party with a recognized, near-sovereign interest in the killing. Reading them through a purely modern civil/criminal distinction distorts their function.
A second trap involves the relationship to the royal pardon. In some periods and sources, letters of slains appear to be a condition precedent to the Crown issuing remission; in others, the sequence is reversed or the instruments are simultaneous. Researchers should not assume a fixed procedural order without examining the specific source context.
Finally, the term itself appears in variant spellings across historical documents — slains, slayns, slanis — and may require flexible search strategies in manuscript and early print sources.
Historical Dictionary Support
Black's Law Dictionary provides only peripheral treatment of this term. The excerpt available to this entry addresses letters of safe conduct — a distinct instrument — rather than letters of slains directly, which reflects the English common law orientation of Black's and its limited engagement with distinctly Scots legal institutions.
The substantive historical treatment of letters of slains belongs to the Scottish legal tradition and is better traced through sources focused on Scots law. The concept reflects the broader medieval European institution of private composition for homicide — the settlement between killer and kin that preceded or accompanied the assertion of royal jurisdiction over violent crime. As the Scottish Crown progressively claimed greater authority over serious crime from the 14th century onward, the letters of slains evolved from a purely private instrument into a formal prerequisite for royal mercy, illustrating the gradual absorption of private vengeance into public criminal law.
Historical legal dictionaries rooted in English law largely omit this term or subsume it without adequate explanation. Researchers relying solely on Black's or similar English-oriented dictionaries will find little guidance and should consult specialized treatments of Scots legal history.
Jurisdictional Note
Letters of slains are a creature of Scots law with no direct equivalent in English common law or American law. Researchers working in jurisdictions outside Scotland should treat the term as a historical artifact of the Scottish legal system unless a source explicitly imports it into another context, which would itself be historically noteworthy.