`You won't find it very difficult, for there ain't much dust up here.

Only, the frost settles on them sometimes, and the drops of rain leave marks on them.' `I can easily clean them inside,' I said; `but how am I to get the frost and rain off the outside of them ?' `Oh!' he said, `it's quite easy.

There are ladders all about.

You've only got to go out at the door, and climb about.

There are a great many windows you haven't seen yet, and some of them look into places you don't know anything about.