From The Innocents Abroad by Mark Twain, 1869.

Here's a precursor to web searches, from Elizabethtown College's Etonian yearbook, 1922.  (For some unbelievably weird yearbook imagery, see our How to Hoodoo Hack a Yearbook.)

Here's a face in the landscape from Une Fête de Noël sous Jacques Cartier by Ernest J. Myrand, 1888.

From Choosing Employees by Mental and Physical Tests by William Fretz Kemble, 1917.

From The Philosophy of Laughter and Smiling by George Vasey, 1875.

We learn here that turning a frown upside down doesn't require a full inversion.  From With the Children on Sundays, Through Eye-Gate, and Ear-Gate into the City of Child-Soul by Sylvanus Stall, 1911.

Here's a captive audience from The Choice Works of Thomas Hood, 1881.

An illustration from Laughing Ann by Alan Patrick Herbert (1925).

An illustration from a 1916 issue of Collier's magazine.

In this diagram of human development, the pictures of the fetus at four and six weeks (top left and middle) bear a striking resemblance to Mayan hieroglyphics.  The top right picture, of the fetus at two months, bears an uncanny resemblance to an Olmec head statue.