A Mysterious Invitation

On Friday, something rather curious happened. I was browsing children's books in a charity shop (I'm looking to find some nice chapter books to read to Nelly now she's moving on from picture books) and I happened upon one by Allan Ahlberg - "The Better Brown Stories". The title caught my imagination and as I am a big fan of his stories for younger children, I picked it off the shelf to have a flick through. As the pages fluttered through my fingers, something slipped out and fell to the floor. A bookmark left by the previous owner perhaps? I picked it up and turned it over. This is what I saw:


In case you are struggling to turn your PC around to read it, it says "Bumped your head and in a spin? Lost and all at sea? Just find the party in the woods and have a cup of tea" Can you imagine my excitement at finding such a deliciously mysterious offer? There was nothing on the back of the card to suggest where these woods might be, so alas I was unable to join the party. There is a suggestion of Alice in Wonderland about it, isn't there - especially when you look closely and see the little tiny tea-cup in the middle:


So if anybody out there can shed any light on the provenance of this rather charming yet elusive invitation, I would be most grateful!

Tea Party Update!
I think I've solved the mystery - the previous owner of the book was also a big Ahlberg fan...I think it came from here!....one of the few books of his we haven't read yet...but I'm off to Amazon right now!