'Then let's go birds'-nesting. You can't think how dreadfully I want to find a cuckoo's egg. Arthur Hill has one at school, and he's so proud of it, he wouldn't change it though a boy offered him five sticks of mint-rock and a pea-shooter. I'm sure we ought to get one about here: I've heard such lots of cuckoos lately. We'll look in every nest we find.'