Plenty of Nothing

Geese

From E.O. Somerville, Slipper's ABC of Fox Hunting (1903). Source.

The Tournament on Horses

Source.

Italian Joust

Source. This work appears in the Met's exhibition of Maximilian I's jousting armour, which you can see in this video.

San Giorgio e il Drago

Saint George and the dragon, from the catalogue of the 1884 Turin exhibition. Source.

Another George and the Dragon

George and the Dragon by the Master of the Housebook. Source.

The Great Epizootic of 1872-73

Adonirum B. Judson's map of the Great Epizootic of 1872-73, an equine influenza that broke out in Markham, Ontario and spread through North America's horse population. In the days before the Canadian Pacific Railway the disease had to travel by way of the United States to reach Vancouver, taking from September to June to do so. Source.

Ema

Ema (literally, "horse pictures") are those votive images sold at Shinto shrines, and can include a painting of nearly anything, but this one really does have a horse. Source.

Joust

This is only one of 146 jousts recorded in the Tournament Book of Duke Johann Friedrich the Magnanimous of Saxony, c. 1535. It's housed at the Veste Coburg. Source.

Donatus and the Dragon

Saint Donatus of Arezzo slayed a dragon by spitting on it. His feast day is today. Source.

The Vale of the White Horse

The Vale of the White Horse, c. 1939, by Eric Ravilious. Source.