@pollyhemlock Yes, you’re right, the Mouldiwarp is from The House of Arden and what a grumpy ‘fairy’ he is - just like the Psammead, now I come to think of it. I loved The Wonderful Garden too, and you’re right again; it is the only one that has a possible rational explanation for anything magical. I wonder why.
@LadyBrendaLast Yes, it did place the setting for The Magician’s Nephew very well for a child, didn’t it. And I think it was also a way for CS Lewis of acknowledging E Nesbit’s influence on his work. He’d grown up reading and loving her stories - one of which has a child getting into another world through a wardrobe.
I must apologise. I’ve only just realised that I managed to muddle up two book threads and so started chuntering on about Monica Dickens’ adult books on the wrong thread! I did like her children’s books too, especially the World’s End series - living with lots of animals and no bossy grown-ups!