Very telling, and it prompted what he chose to say next.

"...He's alive," Cor said quietly as a start. He had handled the cost of the rooms which, in fact, were currently costing them nothing except a favor owed to Cor by the motel's owner. "However, there was some form of poison or venom that went untreated and infected all of him. ...Currently he is chained to his bed and has yet to regain complete consciousness due to the fever, we believe. His Majesty mentioned that earlier that day, you had taken on a particularly dangerous hunt?"

He was well aware how much information that was, but he wanted to start to find out how much Ignis knew of the attack and Gladiolus' behavior leading up to it.