A field is a structured epistemic territory. It is more than a topic, larger than a bibliography, and more coherent than an archive. A topic names an area of attention; an archive stores traces; a discipline institutionalises habits; but a field becomes legible when work, concepts, methods, references and access systems begin to reinforce one another. Its existence depends on density, recurrence, internal grammar, navigable structure and threshold closure. A field is therefore neither pure content nor pure institution. It is a territory of thought that can be entered, traversed, cited, taught, extended and contested. This distinction matters because many contemporary knowledge formations confuse scale with structure. Digital humanities, for instance, has access to enormous archival mass: HathiTrust Digital Library was described in 2017 as comprising 15.1 million digitised volumes, and the NEH later referred to computational access to 16.7 million volumes. That is extraordinary archival magnitude, but magnitude alone does not automatically produce a field; it becomes a field only when methods, tools, questions, corpora, standards, institutions and interpretive protocols organise that mass into repeatable inquiry.