After his trip to Russia and the Caucasus, M.A. Morrison, an agent of the "British and Foreign Bible Society" in southern Russia, published an article titled "The Geographical Distribution of Modern Turki Languages" in a prestigious British journal. The sixth section of the article is titled "The Azerbaijani or Transcaucasian."

Axar.az reports historian Zaur Aliyev shared this information.

The author writes: "I now cross the main ridge of the Caucusus, and come in contact with another Turki Language, the Azerbijani or Trans-Caucasian. It is the language of an important settled population in Trans-Caucasia and North-West Persia, numbering over 3,000,000. Here we find the descendants of the old Kizil-Bashi. In large districts of Georgia, in Shirwan, and Karadagh, on the Western Caspian coast from Resht to Derbent, in the Sirdarlic of Erivan, in the Persian provinces of Azerbijan, Ghilan, and Mazandaran, this is the vernacular.
It is a peculiar and corrupt form. For philologists it has none of the value of the more archic languages, e.g. the Uigur. German missionaries, stationed in Shusha, about the year 1830, were the first to reduce to paper its grammatical principles. In this they were assisted by a most able Armenian linguist, Mirzu Ferukh."

M.A. Morrison’s article was published in the Journal of the Royal Asiatic Society of Great Britain and Ireland in 1886.