Definition
In English law, the straying and escaping of cattle out of the lands of their owners into other unenclosed land, resulting in an intercommoning of cattle across adjacent parcels. The doctrine arose in agricultural communities where fields held in severalty — that is, by separate owners under separate cultivation — were, after the harvest had been gathered, thrown open collectively as common pasture for the livestock of all neighboring proprietors. Shack is thus a form of temporary common right triggered by the seasonal state of the land rather than by permanent grant.
The right of shack is sometimes described as a right of common appendant or appurtenant arising by custom, but it operates distinctly: it attaches not to a permanent state of the land but to the post-harvest condition of arable fields. Once crops are carried off and the fields lie open as stubble, the customary right activates, permitting cattle from surrounding holdings to graze freely across boundaries that would otherwise exclude them.
Common Language
Modern common usage (Wiktionary): "To live (in or with); to shack up." Also used as a noun to mean a rough, poorly built dwelling or cabin.
Historical common usage (Webster's 1913): "To shed or fall, as corn or grain at harvest"; "to feed in stubble, or upon waste corn"; "to wander as a vagabond or a tramp."
The common meanings are not merely unrelated to the legal meaning — they are, in the case of Webster's, actually closer to the underlying agricultural context. "To feed in stubble" captures the practical scene that the legal doctrine addresses. A researcher encountering the word in historical agricultural or legal records should resist both the modern colloquial sense (casual cohabitation or a ramshackle dwelling) and the narrow assumption that the term is purely technical jargon with no vernacular history.
Common Confusion
Shack is frequently subsumed under the broader heading of common of pasture, and historical sources often treat it as merely a subtype of that right. The distinction matters: common of pasture is typically a permanent right attached to a dominant tenement, exercisable across defined land regardless of season. Shack, by contrast, is a customary, seasonal, and reciprocal right arising from the agricultural cycle — it applies after harvest, across fields normally held in severalty, and benefits all participating proprietors mutually rather than one dominant estate at the expense of a servient one. Bouvier's cross-reference to "COMMON" without further elaboration risks obscuring this difference for researchers who do not read the extended entry.
Why It Matters in Research
Shack is a narrow English customary land right with virtually no direct American common law reception. Researchers encountering the term in U.S. sources before the mid-nineteenth century should treat it as a reference to English agricultural custom, not a recognized American doctrine.
In English legal history, the practical significance of shack lies in enclosure disputes. As open-field systems were dismantled through Parliamentary enclosure acts, rights of shack — being customary and often unregistered — were among the first to be extinguished without compensation. A researcher examining enclosure awards, tithe maps, or manorial records will occasionally find shack rights noted, disputed, or simply ignored. The absence of shack from an enclosure award does not necessarily mean it was recognized and preserved; it may mean it was treated as extinguished by operation of the award itself.
The cross-reference in Bouvier to "COMMON" is a research redirect, not a definition. Researchers using Bouvier should follow that cross-reference and read the full Common entry, which provides the contextual framework within which shack operates. Bouvier's brevity on this term reflects its limited relevance to American practice at the time of writing.
Black's Law Dictionary (both the first edition and the supplemental second edition) rely on a single citation: 2 H. Bl. 416, a reference to Henry Blackstone's Reports. Researchers seeking primary authority should locate that report directly rather than treating the dictionary entries as self-sufficient.
The Webster's 1913 entry is unexpectedly useful: its provincial English usages — "to feed in stubble," "to shed or fall as corn at harvest" — preserve the agricultural vernacular that gave rise to the legal doctrine. Historical documents, farm records, and manorial accounts may use the term in this vernacular sense, and the legal right of shack is in part a formalization of exactly this practice.
Historical Dictionary Support
Black's (both editions) and Burrill's are in agreement on the core definition and cite the same authority. All three describe shack as involving unenclosed land and intercommoning following the departure of crops. Burrill's adds the explicit phrase "unenclosed land," which is important: shack does not arise over permanently enclosed fields, a limitation that the Black's entries imply but state less precisely.
Bouvier's single-word cross-reference is the outlier. It tells the researcher nothing about shack itself but implicitly confirms that the right was understood as a species of common — a classification consistent with the other sources.
None of the historical dictionaries address the customary and seasonal character of shack with precision, nor do they distinguish it clearly from permanent common rights. This is a gap. A researcher who reads only the dictionary entries may underestimate how dependent shack was on the open-field system and how thoroughly it was eliminated by enclosure.
Jurisdictional Note
Shack as a legal doctrine is English in origin and application. No significant American common law body developed around it, and it has no statutory analog in American jurisdictions. Commonwealth countries with English agricultural heritage — particularly older English county records in Australia and Canada — may preserve references to the right in colonial-era land grants or manorial records, but the doctrine did not transplant with vitality.