Mycroft had been planning to tackle the more biased political accounts after looking over the neutral material. The fact that the librarian has—not anticipated his plans, but thought along the same lines—is quite keen of her, for a person of average intelligence. He goes over her again for any data he may have missed. A couple new possibilities align in his head. Nothing concrete, but the possibilities are there.

"This will do perfectly for now. Thank you for you assistance," he says, in a forgettably kind sort of way.

He'll ask after her name at the desk later on.