That is the world of your art and my art.
Unfortunately all the pictures in the galleries weren't painted just for you and me; but you'll find, if you look for them, plenty that were, and the rest don't matter.

Those were painted, no doubt, for some one else.

But if you could find the some one else for whom they were painted, the some one else whose world of 'Let's pretend' was just these pictures that don't belong to your world, and if they could tell you about their world of 'Let's pretend,' ten to one you'd find it just as good a world as your own, and you'd soon learn to 'pretend' that way too.
Well, the purpose of this book is to take you into a number of worlds of 'Let's pretend,' most of which I daresay will be new to you, and perhaps you will find some of them quite delightful places.

I'm sure you can't help liking St.Jerome's Cell when you come to it.

It's not a bit like any room we can find anywhere in the world to-day, but wouldn't it be joyful if we could?
What a good time we could have there with the tame lion (not a bit like any lion in the Zoo, but none the worse for that) and the jolly bird, and all St.Jerome's little things.
I should like to climb on to his platform and sit in his chair and turn over his books, though I don't believe they'd be interesting to read, but they'd certainly be pretty to look at.