It is correct to write mother of pearl (without the hyphens) as well as mother-of-pearl (with the hyphens). Either way you want to write it is correct but you may be surprised to learn that mother of pearl is not a pearl at all. Mother of pearl does have some similarities to pearls.
The âring around the rosieâ was the circle of townspeople tending the pyre of bodies being burned in an attempt to stop the spread of the disease, hence, âashes, ashesâ, and âwe all fall downâ attests to the futility of this practice. As I heard the storyâ¦.
Here's a couple of links about the deeper meanings of the nursery rhymes you mentioned: {Ring a Ring o' Roses} {Humpty Dumpty}. Apparently Ring Around the Rosie didn't originate with the plague, and Humpty Dumpty can be linked to a medieval cannon OR to royalty.