Feeling rather lighter because of that answer, Leto stepped onto pavement and tucked his hands back into his pockets casually.
"No, as far as I can tell, there are some who were born here -- Cityborn, it seems they're called. It's closed now, but there's a library here. I found a lot on the City -- there're some news articles from a time a few years ago when the City took on the form of a man. He -- it, I suppose -- It was trapped in a human form, but I never did learn how that happened, or how it was returned to its natural state."
Leto stared at the pavement between his feet, debating about telling the Doctor about the other possible time traveler here. Oswin. He finally decided to keep it to himself, at least until he found her again and asked what she thought.
"What are you a doctor of?" Leto asked, looking up again. He was beginning to think that Oswin needed a doctor.