It gives the impression of a voice that would get more profound as it experienced more of life to sing about.

That's a lovely way of putting it. I've listened to 'Gone' before, but Viggo and Dom? or Henry? were supposed to be singing too, and I could never pick out Elijah with any certainty. I'll have to listen to the song again with your description in mind.

I hope his pack-a-day habit doesn't start affecting his wind. :(