Not only the Emperor, but the Third Prince also suspected the arson was the doing of Prince Ling's Mansion.
It was because he had just attempted to assassinate Murong Jiu not long ago when Prince Rui's Mansion encountered such an incident.
However, soon the Emperor had excluded Prince Ling's Mansion from suspicion.
They did not believe that Murong Jiu, a mere woman, had such capability, and Jun Yuyan was still on his way back, needing at least eight more days to return, too far from the Capital City to execute such a meticulous plan.
Moreover, the Emperor's men soon found out that a year ago, the Second Prince's Mansion had purchased fire oil.
The Emperor immediately sent someone to the Second Prince's Mansion to inquire about the whereabouts of the fire oil bought last year without any courtesy.
After the search, they found no fire oil in the storehouse of the Second Prince's Mansion.