Chapter 59 returns to John Sarrasin's letter, which covers the events of 1249–50. The final chapters cover Louis's crusade and its failure, the Mongol invasion of Syria and its ultimate defeat at Ain Jalut (1260) and the "coup d'état" which brought Baibars to power in Egypt and ended the Ayyubid dynasty (1260). The last chapter tells how the new sultan expelled the Christians from Jerusalem and they made their way to Acre, the capital of what remained of the Kingdom of Jerusalem.