If you can't do it, you say so, and there's the end of it.

But that's no reason for not asking another time; there is always something to ask, and you understand that, and don't expect us to stop asking just because you have to say no sometimes.

Now, this whole trouble comes from this; for when I asked Fani to ask Aunt Clarissa to give me some twenty or thirty old boxes to keep my specimens in, he said it was not proper to ask for so many things, and I could pack them in paper.

Just think of that! To wrap living creatures up in paper! Of course Fani doesn't understand anything about such things.
Now what I want you to do, dear aunty, is to write in your next letter that we are to come home; it is high time.

It is four weeks since we came, and that is long enough to be away from home; for home is the best place in the whole world.