A detail of a vintage postcard, date uncertain.

"In the caliope's wake."  From Cartoons Magazine, 1919. 

"Here was the deeply rutted cart-road I had traveled in my vision."  From Wayside Tales, 1906.

Said he, coldly, "What have you done with that horse?", from Cassell's, 1896.

From The Master of the Red Buck and the Bay Doe by William Hill, 1913.

"The imaginary horse isn't real, but your idea of it is real" (Marietta McCarty, Little Big Minds, 2006).  Photo as scanned by the Costică Acsinte Archive.

From Das Geschlecht der Pflanzen Betreffenden Versuchen und Beobachtungen by Joseph Gottlieb Kölreuter, 1761.

"Tough on flies," from Joseph Breck's Annual Descriptive Catalogue of Seeds, 1896.

From 1895.

From the Dr. Hess Stock Book, 1901.

From Annals of Horsemanship by Henry Willian Bunbury, 1792.

We're often asked how we relax after a long night of time traveling through old books.  Here's a hint: it involves the horse mask we acquired from Archie McPhee.  (As to the feline guardian also pictured, he somehow acquired us along the way.)

Before the "horse of many colors" in Oz, there was the rainbow horse of folklore that "delivered souls through the cosmos, avoiding wayward angels" (Max Evans, Animal Stories).