I have heard the melody or one very similar with another song. Does Corvus Corax give any source?

I know this

Wallace Courts Maron


http://www.youtube.com/watch?v=UfYovzYN8ZU&feature=related

From 32 secs :)

This melody appears several times in the film :)


Princess theme

http://www.youtube.com/watch?v=fk8323r577w