Edited sentence: All this points to the document having a literary origin which was taken up in folk culture or or rooted in nationalistic sentiment.Finally, each of the variants are addresses to different people: Osman, Ahmet II, Ahmet IV, Mahmud IV etc.Secondly, had this document been true, various variants would not exist.The Cossacks never sent such documents to foreign countries in such a style.The fact that this letter is not a true document of diplomacy of those times but a literary work has been demonstrated in numerous ways.Thirdly, the variants have different dates (1600, 1619, 1620, 1667, 1696, 1713 and others) Moreover, there are different signatures under the letter: Otaman Zakharchenko, Ivan Sirko,  the Nyz Cossacks etc.This can be seen in comparing archival materials of Cossack letters from various dates and content