Grey was waiting outside when he saw Robert walking out of the Gnome camp with two Peak Venerables. Even from the distance, he could tell these people were very strong.
'How did he get them to send these two with him so quickly?' Grey didn't know what Robert spoke with the Prince, so he was a little startled that the Prince sent these two with him.
Grey didn't know which of the Princes were present here, but he knew one of them would at least be here and experts like these two are those who are charged with protecting the Prince.
He didn't think too much about it, there was no reason thinking about it. The plan was to immobilize these two and send them back to force out whichever Prince is hidden there. If Grey could get a Prince under Robert's control, they might be able to acquire a shocking amount of information.