Here's a mad hatter from Punch, 1863.

From Die Bühne, 1925.

From Die Muskete, 1914.   Also very much of interest: The Young Wizard's Hexopedia.

Here is revealed how magicians make time for practice.  From Die Bühne, 1925.

Talking through his hat.  From Die Bühne, 1925.

INSTRUCTIONS: Click to see the prices go up.

From 1903.

Q: "Why did Lewis Carroll?"

A: "Because Alice threw the looking-glass!"

—The Sketch, 1901

"A very seedy hard felt hat."  From The Adventures of Sherlock Holmes, 1892.

Here's a rabbit magician (a detail of an Easter postcard, date uncertain).  We had previously uncovered this giant rabbit magician pulling a man out of his hat, from 1910.

Living made easy with a revolving hat with eye-glass, cigar, scent box, spectacles and hearing trumpet, from 1830.

A precursor to Burgess Meredith as The Penguin in Batman.  From Die Muskete, 1912.

The radio hat of 1931.

"If you dream of a black cat, a hat and a broom, 'tis a sign that your wishes will come true quite soon."  Date uncertain.

Here's a portrait of Los Angeles, California, from The Florists' Review, 1921.