About eighteen-nineteen. So was Nyssa, come to think of it.

Ahhh, Romana. Well, she was sort of...tricked into helping me. I was sent on an errand, though it was more like a scavenger hunt through time and space, and she was assigned to me as my assistant. But once we accomplished our task, she stayed with me for a long, long time. We didn't always see eye to eye on things, but travelling with me certainly broadened her mind.