Definition
Directories are published compilations of names, addresses, and related identifying information organized for reference purposes — telephone directories, city directories, professional membership lists, trade directories, and similar works. In legal usage, the term arises most often in copyright and unfair competition contexts, where the central question is whether a compiler of such a reference work holds enforceable rights against a competitor who copies from it.
A directory may be entitled to copyright protection, but that protection is limited and does not extend to the underlying facts — only to original creative expression, including the selection, arrangement, or coordination of entries where those choices reflect independent judgment.
Common Confusion
Directories (as copyright subjects) are a subset of the broader category of factual compilations. Researchers sometimes conflate the rules applicable to creative works with those applicable to directories and other purely factual compilations. The originality threshold for a directory is lower than for an expressive work but higher than mere effort — a distinction that Anderson's framing gestures at but does not fully theorize. Do not assume that copyright doctrine applied to novels or maps maps cleanly onto directory cases without checking for compilation-specific authority.
Why It Matters in Research
The legal significance of directories in the Law Mind corpus is almost entirely channeled through copyright doctrine, and researchers should navigate accordingly. The key tension in older authorities — running from 19th-century treatises through mid-20th-century case law — is between the "sweat of the brow" theory (that labor alone justifies protection) and the originality requirement (that only creative selection or arrangement is protectable). American law resolved that tension decisively in the modern era, but historical sources in the corpus may reflect the older approach without flagging the doctrinal shift.
Anderson's entry on directories cross-references COPYRIGHT, and researchers should treat that as a firm signal: the substantive doctrine lives under copyright, not under a freestanding "directories" doctrine. When searching historical sources, look for directories discussions embedded in copyright chapters or treatises, not as standalone entries.
The specific research trap: Anderson's framing — that each directory is original "as far as the selection is original" — anticipates modern doctrine but was not universally applied in his era. Older courts sometimes protected directories on pure labor grounds. If you are tracing the development of the originality requirement as applied to factual compilations, the directories cases are a primary site of that evolution, and the historical dictionaries will not clearly mark which authorities survived and which did not.
Jurisdictional variation also mattered historically. English law developed the sweat-of-the-brow doctrine more durably than American law ultimately did. Researchers working with comparative or pre-20th-century sources should be alert to which legal system's assumptions a given authority reflects.
Historical Dictionary Support
Anderson's Dictionary of Law does not provide a standalone substantive definition of "directories" but instead routes the reader directly to copyright doctrine — a structurally honest choice, since the legal significance of directories is entirely derivative of copyright principles. The entry's operative content addresses two points: first, that commercial value based on editorial selection (choosing which names to include) is what generates originality, and thus protectability; second, that independent compilation from primary sources is permissible, while copying entries verbatim from a competitor's directory is not.
Anderson's observation that "one compiler may not merely copy names from the other's book; but he may use it to verify the orthography of names or the correctness of addresses" draws a line between legitimate verification and actionable copying — a distinction that remains relevant in modern doctrine. The evidentiary note is also practically useful: the presence of identical errors in two directories has long been treated as circumstantial evidence of copying rather than independent compilation, a principle courts have applied across many categories of factual compilations beyond directories specifically.
What Anderson's entry does not address — and what the historical dictionaries generally miss — is the theoretical basis for protection. The sweat-of-the-brow theory lurks behind many 19th-century authorities without being named or examined. Researchers relying solely on historical dictionary entries will not find the doctrinal fault lines clearly drawn; those must be traced through the treatise and case law literature.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia — COPYRIGHT (originality and compilations); UNFAIR COMPETITION (misappropriation of commercially valuable information).