Definition
An archaic phrase from old English law signifying the right of a woman, upon reaching the age of fourteen or fifteen years, to take charge of her household — to keep its accounts and hold its keys. The phrase thus stood as a shorthand for domestic legal competency: the recognition that a female of that age possessed sufficient understanding to manage a household's affairs.
The phrase is found primarily in Bracton's thirteenth-century legal treatise, where it appears in the Latin formula: a woman at fourteen or fifteen years of age may take charge of her house and have cone and key ("potest disponere domui suae, et habere Cone et Keye"). It carries no modern operative legal significance and is encountered only in historical research contexts.
Common Language
Modern common usage (Wiktionary): No entry. The phrase is not part of modern English vocabulary.
Historical common usage (Webster's 1913): No entry. Even by the late nineteenth century the phrase had passed entirely out of ordinary use.
Editorial note: This is pure legal archaism with no common-language counterpart. The words "cone" and "key," taken individually, are ordinary English nouns; as a legal term of art, their combined form bears no relationship to either modern word. The section is noted here only to flag the potential confusion a researcher might encounter when parsing the phrase literally.
Common Confusion
Two competing etymological explanations appear in the historical sources and have caused long-standing uncertainty about what the phrase actually means.
The first interpretation, followed by Cowell and adopted by Black's and Bouvier's, reads "cone" as relating to accounts or reckoning — so that "cone and key" means the keeping of household accounts and the physical custody of keys to locked stores.
The second interpretation, attributed to Lord Coke, holds that the original phrase was "cover and keye" — meaning the woman knew what in her house should be kept under cover and lock. On this reading, "cone" is a corruption or transcription variant of "cover," and the phrase emphasizes custody and security rather than accounting.
Burrill's Law Dictionary adds a third layer, noting a possible Saxon derivation for "cone" or "colne" meaning simply "an account." This linguistic root supports the accounts-and-keys reading, but Burrill himself presents it as a linguistic note rather than a settled resolution.
Researchers should treat the phrase as carrying both meanings simultaneously in its historical context — household stewardship encompassing both record-keeping and physical custody — rather than choosing between interpretations as if one were legally controlling.
Why It Matters in Research
This term is relevant exclusively to researchers working in medieval or early modern English legal history, particularly in connection with the legal status and capacities of women, the history of age of majority and legal competence, and the development of household or domestic law.
Several navigational points are worth noting:
First, the term appears almost nowhere outside of sources deriving from Bracton's treatise (circa 1235). Researchers tracing the phrase should go directly to Bracton, De Legibus et Consuetudinibus Angliae, folio 86b, rather than relying on secondary dictionary paraphrase.
Second, the phrase illustrates a broader research pattern: medieval English law recognized differentiated age thresholds for different legal capacities, and these thresholds varied by sex. Cone and key represents the female threshold for domestic management at fourteen to fifteen, a counterpart to the male threshold for knighthood and land tenure at twenty-one. Researchers studying age-based legal capacity must map these distinct frameworks rather than importing a single modern concept of majority.
Third, the Coke interpretation — that "cone" is a corruption of "cover" — is worth flagging as an early example of a common phenomenon in English legal history: later jurists rationalizing archaic phrases into more familiar terms, sometimes obscuring the original meaning. Coke's reading in 2 Institutes should be treated as an influential gloss, not as authoritative philology.
Fourth, the phrase has no statutory survival and no common-law progeny. It died as English law modernized and consolidated the age of majority. Any source citing cone and key in a context later than the seventeenth century should be treated with caution.
Historical Dictionary Support
The historical dictionaries are in unusually close agreement on the basic definition, nearly all tracing back to Cowell and to Coke's 2 Institutes. Black's (both editions), Bouvier's, and Rapalje & Lawrence are effectively paraphrases of one another on this entry, likely because all drew from Cowell's Interpreter as a common source.
Burrill's entry is the most independently useful. By providing the original Latin from Bracton and identifying the potential Saxon etymology of "cone" as meaning "an account," Burrill gives the researcher something the other dictionaries do not: a direct path back to the primary source and a linguistic framework for resolving the cone/cover ambiguity. Burrill's entry is the recommended starting point for any serious research into the phrase.
What the historical dictionaries collectively miss is context about how this rule fit within the broader medieval framework of female legal capacity. None of them situates cone and key within Bracton's larger discussion of women's status, wardship, or marriage law. A researcher relying only on dictionary entries will have the phrase defined but will not understand its legal neighborhood.
Jurisdictional Note
Cone and key is exclusively an English legal concept with no direct reception into American law. The phrase does not appear in colonial American statutes or common law, and no American jurisdiction developed an analog doctrine under this name.