The real name of Imam Warsh, may Allah be merciful to him, is Abu Sa'eed 'Uthmaan bin Sa'eed Al-Misriyy. His sheikh, Imam Naafi' gave him the nickname of Warsh because of his extreme white color. He was born in Egypt in 110 Hijara and traveled to Imam Naafi' in Medinah Munawwarah. Imam Warsh recited to Imam Naafi' a number of complete recitations of the Qur'an and then returned to Egypt and taught people there for a long time. He died in the year 197 Hijarah.
The order of the rules used is the order used by Imam Ash-Shatibiyy in his poem on the seven qira'aat: