Oh, and Gareth, I believe "Ring Around a Rosy" dates to the time of the Black Death. The first line referred to the skin lesions, the second to the fact that people thought they could prevent infection by continually sniffing flowers. The third line I believe was originally "Ashes, ashes" and may refer to the burning of the corpses, but I'm not positive about that. And "All fall down" is obvious.

Aloha,
Mark