Various, Lippincott's Magazine of Popular Literature and Science…
“ So circumscribed and clearly defined are the limits of many of these languages that in some parts of the Eastern Caucasus it is possible to ride through three or four widely-different linguistic areas in a single day. Languages spoken by only twelve or fifteen settlements are comparatively common; and in South-western Daghestan there is an isolated village of less than fifty houses—the aoul of Innookh—which has a dialect of its own not spoken or understood, so far as has yet been ascertained, by any other portion of the whole Caucasian population. ”
