ponies-of-wind-and-sky:

“I found this educational sign today at Beamish museum in Northumberland. The Equine Defence League who produced this, was founded in 1909 by Francis Cox, his initial objective being to improve the conditions for pit ponies working in the mines. His cause was supported by such big names as Jerome K Jerome, Jack London, James Keir Hardy and Winston Churchill.
These signs could at one time be found in places where horses would be pulling heavy loads up hill.
But this is so relevant to every situation in which a horse might be worked today. Perhaps more than ever before.”

–Horse Charming