Did Mark Twain say “Wrinkles should merely indicate where smiles have been.”?

Did Mark Twain say “Wrinkles should merely indicate where smiles have been.”?

Found word for word. Yes. The text appears in works attributed to Mark Twain. Source and location below.

Wrinkles should merely indicate where smiles have been. --Pudd'nhead Wilson's New Calendar.
Following the Equator: A Journey Around the World — Mark Twain (Samuel Clemens), CHAPTER LII. · ¶1607 · Public domain (US), Project Gutenberg #2895 · source

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