"Dispelling the poison will need about four hours. Nurvey, you can go back to the Imperial Palace. There is no reason to wait here while I treat Hyrk."
Nurvey had already waited two hours while Yale healed Hyrk's body and Yale felt bad for making her wait for such a long time, so he didn't want to make her wait any longer while he dispelled the poison.
However, Nurvey shook her head and remained in the same position; she was determined to wait until the poison was dispelled before returning to the Imperial Palace with Yale and Hyrk.
There were some guards that wanted to close the gates and rest, but there was no way that they would leave Nurvey outside and close the gates unless they wanted to lose their puny lives.