Sebastian ushered his young charge into the rather copious library. It indeed dwarfed the one on the Phantomhive estate, which he was sure would irk the young man to no end, no matter how little he cared of the books in either place.
He noticed the woman's presence without actually looking at her; he found it hard to believe that he had missed her when he had found the place, but it was possible. More likely, of course, was that she had only just entered the room herself.
He was not comfortable leaving his young master in the company of a stranger, but he had told the earl to wait here, and if he changed his instructions... No, he was certainly not giving the brat any cause to argue with him.
Quickly he stepped over to the woman's side and bowed slightly. "I apologize for my familiarity," he said softly, "but given the circumstances, I'm afraid I must. If I may ask for my lady's name, so I may properly introduce you to my lord..."