"Thousands of years." Martha can be helpful! Here, she'll let you know just how far away your experience is from hers, Esca. And sometimes she can actually even come close to the mark on that; she wants to reassure him after his face grows worried and surprised at the revelation that she hasn't the faintest idea where Eboracon is. "It might still exist--we might just call it something else. I mean, London still exists, and the Romans called that Londinium. Didn't they?"