According to Jafri, historians like Ya'qubi and Al-Masudi do not mention the terms of the peace treaty at all. Other historians, such as Dinawari, Ibn Abd al-Barr and Ibn al-Athir record different accounts of the conditions, and the timing of the black sheet sent by Mu'awiyah to Hasan was confusing in Tabari's account. The most comprehensive account, which explains the different ambiguous accounts of other sources, according to Jafri, is given by Ahmad ibn A'tham, which must have taken it from al-Mada'ini. Madelung's view is close to that of Jafri when he stipulates that Hasan surrendered the reign over the Muslims to Mu'awiyah on the basis that "he act according to the Book of God, the Sunnah of His Prophet and the conduct of the righteous caliphs. Mu'awiyah should not be entitled to appoint his successor but that there should be an electoral council (Shura); the people would be safe, wherever they were, with respect to their person, their property and their offspring; Mu'awiyah would not seek any wrong against Hasan secretly or openly, and would not intimidate any of his companions." The letter was testified by Abd Allah ibn al-Harith, and Amr ibn Salima and transmitted by them to Mu'awiyah for him to take recognition of its contents and to confirm his acceptance. Hasan thus surrendered his control of Iraq in Rabi II 41/August 661 after a reign of seven months.