The House of Arden by Edith Nesbit

They both meant what they said. And yet, of course, it is nonsense to promise that you will never do anything again, because, of course, you must do something, if it's only simple subtraction or eating poached eggs and sausages. You will, of course, understand that what they meant was that they would never again do anything to cause Mrs. Honeysett a moment's uneasiness, and in order to make this possible the first thing to do was, of course, to find out how to set the clock back. Slowly munching sausage, and feeling, as she always did when she ate slowly, that she was doing something very virtuous and ought to have a prize or a medal for it, Elfrida asked her mind to be kind enough to get some poetry ready by the time she had finished breakfast. And sure enough, her mind, in its own secret backyard, as it were, did get something ready. And while this was happening Elfrida, in what corresponded to her mind's front garden, was wishing that she had been born a poet.

"Like the one who did the piece about the favourite goldfish drowned in a tub of cats," she said pensively.