In addition to this he had arranged with a renegade German, known as Maitre Georges, a man of very great ability as an artilleryman and engineer, to desert to the city, and there do all in his power to assist the besiegers, both by affording them information and by giving bad advice to the besieged. On the day after Paleologus, who was himself a renegade Greek, had established his camp, he sent in a herald to summon the city to surrender, at the same time making lavish promises that the lives and property of the native population should be respected, and that they should be allowed to continue to reside there, to enjoy the full exercise of their religion and of all other rights they possessed. The pasha had no real hope that the knights would obey the summons, but he thought that he might excite a spirit of disaffection among the townspeople that would, when the crisis came, greatly hamper the efforts of the defenders.