[Vastra looks mildly offended by being called 'England', but it's accurate enough if she's going to call him American. So, they were even in some strange way.]

That would be the smartest thing to do, [She agrees, trudging through the snow and casting a glance back at her new traveling companion.] However given I have only just met you, I hope you will not take offense at my hesitation to let you carry me while I am unconscious, Mr. Bucky.

[...and now that she thinks about it, what sort of name is 'Bucky'? Mammals...]