Noah and Erolia moved across the skies of that city to find the other estates, and luckily all were in the right position. But at some point that stopped being the main focus.
After the house of Earl, Noah made sure to check if they picked anything weird up, and sure enough they did. All three of the estates held an aura hidden from the senses of humans. Noah wasn't a full human anymore, and Erolia was a magical beast. They sensed it too quickly.
He considered informing the elders of his findings, and he did. They had spoken for about an hour and he had been told to cancel the last part of the mission. The assassination.
Noah had refused the idea, or rather he had agreed on not allowing the others risk their lives, but he had assured the elders that he could take care of the assassination even while there was an unknown threat.