I liked it too. There's a bit near the start where one of the characters makes some comment with slightly awkward-sounding wording; I forget what, precisely, but it was exactly the sort of thing you'd expect from a modern English speaker fluffing an attempt to stay in character as a Victorian or whatever. They even sounded a bit like they were half-realising this as they were saying it.

I put it down to a mistake that they didn't have time to fix. But then, given the ending, I realised it must have been deliberate.