Great story. Ever thought about how to recognise time travellers?
1. More likely to meet them at historical moments in history. Millenium celebrations, start of wars etc.
2. More often than not, they'd be fairly wealthy or super wealthy.
3. They'd probably have a weird accent.
4. They might look a little different.
5. They'd probably know a more than average amount about politics and current affairs.
6. They'd maybe get far more coughs, colds and tummy bugs than normal - or maybe be completely immune to everything.
There's got to be more things that would give them away.