Sherlock is paging through the 'enchanted' book with some little wonder: tapping here, writing in it with his finger there, exploring the varied functions of the interface, as he understands it. He looks up at the question--"Earth in the year 2012," is his absent answer, and then he's back to Dorian's book. The inquiry does snag at his attention for an instant or two longer, though: how to describe what manner of world he's from to another unfamiliar with its technology? Post-industrial means nothing without the context of industrial; previously he's at least had the reference point of an environment to point to. Now he just has words and words of meaningless history.

"The world I'm from is rife with devices," he says, "like the one you're now holding. Our technological development accelerated after the discoveries of new sources of power. We now depend largely upon--electricity, and electrical engineering."

A moment later he sits down next to Dorian, legs crossed, for the purpose of comparing the two devices side-by-side. He looks (and is) engrossed.