When Charles begins staring, Mycroft continues to stare right back. Charles' reaction is an odd one, to be sure; most people, upon noticing they were being watched, would feel significant discomfort, but this young man shows none at all. Surprise at first, yes (almost as though someone tapped him on the shoulder), but then an intense interest—just as Mycroft studies him, Charles seems to study Mycroft in return.

Eventually he motions for Mycroft to join him. For once, the elder Holmes is stumped. He has no idea what Charles could have gotten out of that exchange, unless his mind operates on the same level as Mycroft and Sherlock's (and it very well could, for this world has exhibited much stranger things). Curiosity inevitably wins out over antisocial tendencies, and Mycroft comes forward, taking a seat in the suggested chair.

He crosses his legs neatly and rests one hand on the curved handle of his umbrella. Reflexively, he attempts to evaluate the probability of danger in this situation, but of course finds he has no data to draw upon. Calculations for escape methods based on Charles being a common human continue to scroll through the back of Mycroft's mind regardless.

Figuring that staring at each other for the better part of two minutes is enough of a greeting, Mycroft jumps right into it. "I believe we spoke over the Network a couple days ago, regarding some recommended reading."