At length prejudices were carried so far on both sides, that Frederick was judged more favourably of by his enemies than by his own army; and Melik-Kamel would sooner have found grace among the Christians than among his own troops. The infidels regarded the emperor of Germany as a prince full of wisdom and moderation; Abulfeda, and all the Arabian authors, have celebrated the qualities and virtues of the monarch of the Franks, whilst the continuator of William of Tyre only speaks of this prince with bitterness, and reports in his history, that all the apostles and other Christians had great doubt and great suspicion that he was far gone in infidelity, and warm in his belief in the law of Mahomet. Hatred soon broke out in acts of treachery and the most odious plots. As the emperor had expressed an intention of going to bathe in the waters of the Jordan, the Templars addressed a letter to Melik-Kamel, pointing out the means of surprising the head of the Christian array in his pilgrimage: the sultan of Cairo despised such treachery, and sent the letter he had received to Frederick. At the same time Melik-Kamel learnt that the sultan of Damascus had declared war against him, and would be joined by several other Mussulman princes. The sultan of Cairo and the emperor of Germany had carried on their negotiations for peace during several months, but now, pressed on all sides by enemies, and surrounded by dangers, even in their own camp, they at length resolved to end the matter, and conclude a treaty, which would permit them to dispose of their forces for their security or for their personal ambition. They agreed between themselves, that they would make a truce of ten years, and that Jerusalem, Nazareth, Bethlehem, and Thoron should be given up to Frederick or his lieutenants.[237] According to the conditions of the treaty, the Mussulmans were to retain in the holy city, the mosque of Omar and the free exercise of their worship: the principality of Antioch and the county of Tripoli were not comprised in the treaty. The emperor of Germany undertook to divert the Franks from every kind of hostility against the subjects or lands of the sultan of Egypt.