So, I was reading an article on Wikipedia when I noticed this;

Sultan Mahmud IV to the Zaporozhian Cossacks: As the Sultan; son of Muhammad; brother of the sun and moon; grandson and viceroy of God; ruler of the kingdoms of Macedonia, Babylon, Jerusalem, Upper and Lower Egypt; emperor of emperors; sovereign of sovereigns; extraordinary knight, never defeated; steadfast guardian of the tomb of Jesus Christ; trustee chosen by God Himself; the hope and comfort of Muslims; confounder and great defender of Christians -- I command you, the Zaporogian Cossacks, to submit to me voluntarily and without any resistance, and to desist from troubling me with your attacks.

Is this what the Sultan really wrote to the Cossacks?