Susan looked into her cup of tea as if she would find the answers there. Her voice changed somehow, the royal manner of the gentle queen coming to the fore as she told the familiar story. "It was Deep Magic. The first time we came because we had to free Narnia from the White Witch. She held the land in thrall, a hundred years of winter, and it was prophesied that two Sons of Adam and two Daughters of Eve would free the Narnians and rule them. And that was us - the four of us. We ruled there for fifteen years, and then... we were sent back. And a year later - a year later in our world - we came back and a thousand years had passed, and the Telmarines had conquered the Narnians. The usurper Miraz had tried to kill his nephew Caspian, and Caspian called us back with the Horn. My Horn. I do wonder what became of it now that I'm here. I didn't have it when I woke up."
Abruptly Susan realized she'd been talking for quite a long time, and hastily took a sip of her tea. "I'm sorry, I am wittering on. You're a wizard but you're from London, you said? I didn't think there was magic in our world."