Folks do not smile so delightfully when they mean mischief.
 L. Frank Baum, The Marvelous Land of Oz (1904). copy citation

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Author L. Frank Baum
Source The Marvelous Land of Oz
Topic mischief smile
Date 1904
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/54/54-h/54-h.htm

Context

“replied the Pumpkinhead, seriously; "but I cannot think what it is. My father knows all about it, but he is not here." "This is a strange affair very strange!" declared the Guardian. "But you seem harmless. Folks do not smile so delightfully when they mean mischief." "As for that," said Jack, "I cannot help my smile, for it is carved on my face with a jack-knife." "Well, come with me into my room," resumed the Guardian, "and I will see what can be done for you."” source