Azizi-

Sorry, I can't find any reference to "Selah" or "sea Lion" in my favorite literary references, including THE MUSIC OF BLACK AMERICANS by Eileen Southern. That doesn't mean a whole lot, of course, since there is scarce mention of any musical children's games.

What you suggest makes sense to me but it would be nice to run across some corroborative research.

I'll keep looking. Maybe Barry Finn can dig up something from his experience with the Georgia Sea Islands songs.

Cheerily,
Charley Noble