Are these two sentences worded in the correct manner?

FYI - Geran is the swordmage. Also at that time, Sergen, who was preparing to soon execute his plan to become the lord of Hulburg, made a bargain with Grigor in which Geran would face charges under the harmach’s law. In exchange, the Merchant Council agreed to allow the swordmage to be imprisoned within Griffonwatch Keep until a trial could be arranged, but a detachment of the Council Watch would remain in the castle to guard him.