The Wallypug in London

It is a history book. A most extraordinary thing has happened; the Wallypug has been to London! But there, I am forgetting that possibly you have never read The Wallypug of Why, in which case you will, of course, know nothing about his Majesty, and so I had better explain to you who, and what, he is. To begin with, then, he is a kind of king of a place called Why, which adjoins the mysterious kingdom of Zum. I am afraid, though, that if you searched your atlases for a very long while you might not find either of these places, for the geographers are so undecided as to their exact position that they have not shown them on the maps at all. Some little friends of mine, named Girlie and Boy, have been there, however, and I can tell you, if you like, the way they went.