Nice-sized sketch of a rearing horse. This black and white horse drawing is in the public domain. It depicts a solid colored horse standing up on his hind legs with his mane and tail flowing. The horse is shown wearing what is referred to as a Bonaparte bridle.
Thomas E. Hill must have spent years writing his book Hill’s Album of Biography and Art. It was published in 1882 with hundreds of wonderful illustrations and what appear to be stock print foundry images. Over 200 of them can be found here on Reusable Art.
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.