There are numerous documents on the Circassian genocide and exile. Most of these documents can be found at the Russian archives. British and Ottoman archives also provide extensive evidence on the Circassian genocide and exile. A large part of Ottoman documents have been collected by the Caucasian Research, Culture and Solidarity Foundation (Kafdav). For more information on Ottoman documents, please visit the Kafdav website.
The British documents can be searched through the National Archives, the UK government's official archive.
The link "Academic Studies" provide some of the documents publicly available.
Changes in the ethnic composition of the population living in the Caucasus depict the extent of the tragedy. The Adygean people had lived in the northern part of the Caucasusin Mountains, from the Black Sea to the middle of the Caucasian range before the conquest of their country by the Czarist Russia. The Abkhazians were living in all parts of the present day Republic of Abkhazia. After the Circassian genocide and exile, the emptied and devastated Circassian lands were resettled by Russian, Ukrainian, Armenian, Georgian and other colonists by the Tsarist Empire.
The following maps on the ethnic composition and settlement in the Caucasus document the extent of Circassian genocide and exile committed in the mid-19th century:
Mountain peoples of the Caucasus: late eighteenth century
Mountain peoples of the Caucasus: present day
[Source: Oliver Bullough, Let Our Fame be Great, London: Penguin Books, 2010.]