Betrayed by a Shadow by Raven Dean, 1890.

The keeper of the exclamation point is actually Lady Question Mark.  From The Riddle by Walter Alexander Raleigh, 1895.

Mother Earth beseeches Father Time to spare her another year, from The Carolyn Wells Year Book of Old Favorites and New Fancies for 1909.

From Kunst, Krieg und Krieger by Konrad Escher, 1917.

"The poison bubble," from St. Nicholas magazine, 1903.

From Rhyme or Reason by Nicholas Aufrere Fenwick, 1900.

A toast to Mystery!  The caption reads, "The wine is a mystery." From The Secret of the Court by Frank Frankfort Moore, 1895.

"It's the oldest trick in the book, hidin' in a wagonload o' hay!"
—Henry Clark, The Book That Proves Time Travel Happens

You've heard of the "power of suggestion," but did you know that power is exerted via levers?  From Psycho-Therapy in the Practice of Medicine and Surgery by Sheldon Leabitt, 1903.

From Die Märztage des Jahres 1798 by Gustav Adolf Badertscher, 1898.