"I haven't even met anybody who can give me a clear sense of our borders. I guess that makes sense, since as far as I can tell Jadis's magic didn't stop at borders, so the effective size of Narnia has been however big she wanted it to be for as long as she was in power. She didn't freeze the sea, though, so maybe there are other countries across the water. I'll see if anybody knows anybody who knows shipbuilding."