A traveler of time, you say? Why, this is simply perfect! You see, I have recently come into possession of what appears to be a treatise on the nature of the soul, rescued from the blazing Library of Alexandria! Alas, I know of no way of determining whether it is real or simply an exhaustive forgery... Unless, of course, I could have a look through history myself. 

And that, my lady, is but one reason that I would be more than delighted to accompany you.