"Mm. The libraries have been recommended to me previously."

This is where Lucius might give him a hard time about fraternising with Harry bloody Potter, but perhaps that's better left for another argument. Besides, Lucius could do without the reminder that his personal resentment of Potter is somewhat after this Lucius' time, for all that it is well within Sebastian's.

The end of his cane drags along the ground a few inches as he turns to leave the other where he is. What he intends to do about the fog may be shared when he knows he isn't going to back out of it or fail at it, and he isn't staying to be asked any more despite his indifference as to the privacy of his younger counterpart. "Don't be late for work on my account, now," is mocking chide as he heads for out at a stroll.