Peaceful but sad non-vocal music?

I’m writing a book and I need some music to aid the mood. With suitable music I can focus more on the storyline. My book is a pretty dark and moody one. It’s about a private eye trying to solve a murder case which seems to be directly connected to his own past. Now I’ve come to a scene where the private eye is severely wounded and begins to hallucinate. In his hallucination he sees the spirit of his dead girlfriend reaching her hand to him. Could anyone here recommend me any piece of non-vocal music which best fit that scene? (like this http://www.youtube.com/watch?v=on5d69QOGZ0. I would have used it but the voice at the end of it distracted me)
Thanks in advance and sorry if my question is too stupid to be answer at all