From Purdue University's 1968 yearbook.

From Centenary College's 1932 yearbook.

From The Boyd Smith Mother Goose, 1920.

From St. Nicholas, 1914.

From Wee Wisdom, 1928.

Answers: Rotate the image counter-clockwise and look for bearded King Neptune and his trident in the space between the tree and the hillside.  The smaller mermaid's face is in the water touching the shoreline, below left of the shell. 

From A Book of Famous Myths and Legends, Vol. Vi, 1901.

From King Arthur's Knights by Henry Gilbert and illustrated by Walter Crane, 1911.

From the Duluth Evening Herald, 1914.

The king of the world for peace on Earth.  From the University of Arkansas, Fayetteville's 1961 yearbook.

From Wee Wisdom, 1921.

From Our Kings and Queens, 1889.

From Puss In Boots and Reynard the Fox by Mara L. Pratt-Chadwick and illustrated by Louise E. Norris, 1905.

"This is a true story."  From Hans Andersen's Fairy Tales, illustrated by Frank C. Papé, 1912.

From Our Kings and Queens, 1889.

From The Moving Picture World, 1915.

From King Arthur's Knights by Henry Gilbert and illustrated by Walter Crane, 1911.

From the United States Naval Academy's 1917 yearbook.

"The old fairy's words cause all to weep."  From The Mammoth Story Book, 1902.

From the [Weymouth] Reflector, 1931.

From Wee Wisdom, 1929.