Does anyone recognise this?

[valyates]

I noticed a query regarding a book and several helpful answers so I thought I'd try my luck here too. I've been a member of the society since the very first issue but have only just joined the forum.
I've previously posted this on Booksleuth (Abebooks) with no luck.
I read this book mid 1950s and it seemed contemporary. All I remember is - 1) The central characters were twins, Peter and Prue (short for Prunella) 2) In the first chapter they were leaving their house, whether for good or just a holiday I don't remember 3) Prue collected caries, she had a favourite little pink one the size of her little fingernail and she was taking them with her
Odd things to remember I'll be the first to admit !!
This book would have been written for the same age group as Blyton's Adventure series - several people have told me of Peter and Prue books but those were for much younger children.
Any ideas most gratefully received

[Lucky Star]

I've no idea about the book Valyates but welcome to the forums anyway. Its always nice to see fellow society members joining up here.

[Daisy]

I can't say I recognise any book from the description but I'd love to know what 'caries' are! Tooth decay comes to mind but my dictionary hasn't any other meaning than that and the singular 'cary'? isn't there at all. Please enlighten me!

[Moonraker]

Prue collected caries, she had a favourite little pink one the size of her little fingernail and she was taking them with her

I thought caries were dental cavities. Why would anyone collect them? I'm afraid the story rings no bells with me at all.

[Anita Bensoussane]

I can't say I recognise any book from the description but I'd love to know what 'caries' are!

Perhaps a typo for 'cowries'?

I'm afraid I don't recognise the book either but welcome to the forums, Valyates!

[Daisy]

Thanks Anita. Cowries are shells aren't they, and I know there are little pink ones, so you're probably right.

[Lucky Star]

Fatty would be proud of us.

[Moonraker]

Incredible. I would never have worked that one out!

Speaking of caries/fillings, I ended up chewing one of mine Saturday evening, so I'm off to the torture chamber this afternoon to get the tooth repaired. What a nightmare.

[Wayne Pyer]

One of my least favourite places.
I'm not afraid, honestly! Just allergic to pain that's all.

(slowly drags his huge hulking frame to a dark corner and gently weeps)

[Moonraker]

I was lucky. He put a new filling in, and as the cavity was clean, it didn't need any drilling.

[valyates]

I can't say I recognise any book from the description but I'd love to know what 'caries' are! Tooth decay comes to mind but my dictionary hasn't any other meaning than that and the singular 'cary'? isn't there at all. Please enlighten me!

Yes, they are cowries, I made the same mistake on my booksleuth post - no wonder I'm getting nowhere - can't believe I'm the only person to remember this book!!!