“…and there, lo and behold, was the robin swaying on a long branch of ivy. He had followed her and he greeted her with a chirp. As Mary had skipped toward him she felt something heavy in her pocket strike against her at each jump, and when she saw the robin she laughed again.
“You showed me where the key was yesterday,” she said. “You ought to show me the door today; but I don’t believe you know!”
The robin flew from his swinging spray of ivy on to the top of the wall and he opened his beak and sang a loud, lovely trill, merely to show off. Nothing in the world is quite as adorably lovely as a robin when he shows off—and they are nearly always doing it.”

• The Secret Garden, Frances Hodgson Burnett