AbstractFew sources exist from which to form impressions of how Indigenous Australians have made sense of the questions put to them by linguists. For one survey, conducted by Summer Institute of Linguistics linguists in 1970, we have a transcript of conversations between linguists and speakers. The linguists were asking for information about the mutual intelligibility and geographic extent of the named speech forms they had been tasked with documenting. Linguists and speakers brought to the encounter mutually incompatible visions of how linguistic variation unfolds in space. For speakers, speech-form geography was characterized by reticulation, rather than tessellation, and the mutual intelligibility of neighboring speech forms was to be characterized not in terms of basic vocabulary cognacy but in terms of histories of recurring encounters among speakers of different codes. The 1970 East Kimberley transcript makes audible speakers’ and linguists’ efforts to negotiate a shared way of talking about language.