London is like prison for children, especially if their relations are not rich. Of course there are the shops and the theatres, and Maskelyne and Cook's, and things, but if your people are rather poor you don't get taken to the theatres, and you can't buy things out of the shops; and London has none of those nice things that children may play with without hurting the things or themselves -- such as trees and sand and woods and waters. And nearly everything in London is the wrong sort of shape -- all straight lines and flat streets, instead of being all sorts of odd shapes, like things are in the country. Trees are all different, as you know, and I am sure some tiresome person must have told you that there are no two blades of grass exactly alike. But in streets, where the blades of grass don't grow, everything is like everything else.