In search of books lost

Many years ago I read a rather charming fantasy novel, set in a Civil War period AU where fairies (specifically Oberon and Titania) existed. The hero was Prince Rupert, and some sort of quest came into it. There was also a love story, between Rupert and (I think) his Puritan jailer's daughter. I can't remember the title, although I have a vague memory that the cover had a picture of a boat on it. Does anyone know what I'm talking about?

( Cut for rant about more recent and less satisfactory reading )

Because I am indecisive.

[Poll #983467]

(no subject)

Why do I always forget that the BL ordering system only works in office hours?

Ah well. At any rate, it looks like I'm going to have to pop up to London next Saturday. (Tuesday, the only other day that would have suited - indeed, would have been better, is too soon for the 48 hour ordering thing to work). Bother, that probably amounts to missing Doctor Who.

Such are the vissicitudes of life! It's less annoying than having to inter-library loan journals from Germany, which I'm also about to have to do...