Stephen - maybe "they sang" - less impersonal than which or that, but still can apply to voices as well as people.

The other flying myth, classical this time, is Icarus, and he's not frightened of anything; maybe you could have some kind of transition from once to the other. Though of course he ends up falling. (Ann Lister, whom I gave a link to in the first part of this thread I think, has a good song about him too.)

But anyway don't let other people's fancies about Peter Pan put you off. People think they know about Peter Pan because they've seen the cartoon, or even a cut-down version of the play. There's more to it than that. The Pan bit is intentionally referring to the God Pan, who is in no sense a child. I think one of the idea is that a child would see him as a child. The God Pan generally represents the wild, and freedom from human restraints.