His chest pounded, heart beating fast with anticipation. Black hair was common in his time, but none of it could be compared to Teri's hair.
The child in the library has a flowing black hair, dressed in a light, white dress. It would be easy for him to tell whether it is Teri or not because Teri's presence is unique and has an appearance he would not forget easily. Like a little angel sent by the heavens.
He does not know why he was fooling himself, he just saw the child while having breakfast earlier so it was not possible for the child to come back in the Lanstone Manor in an instance.
But he and his knight, Alec, asked around the palace, no servants or any people saw a little girl at that time. There was not even an announcement of a noble visiting. So he assumed that perhaps it was just his imagination.
Just his mind creating an illusion to remind him about the little girl's words about meeting again.