Thanks Sven for the answer to my last question, re. a "Tea with Mr Tumnus" story for very young children.
Perhaps I didn't put my question very well, though! I'm trying to track down the volume of children's stories in which a story of that description first appeared. Whether it's the same version that's now been published separately I'm not sure--but am doubtful. The version I had as a child must have been published in the early 1970s at the latest, but was very likely a reprint of a book published earlier, perhaps in CSL's lifetime. It was a large book containing many children's stories and probably introduced many children back then to Narnia.
Again, any help with be much appreciated!