Marocco was but a circus horse; there is no evidence to show that he ever trod the stage or took any part in theatrical performances. It is hard to say, indeed, when horses first entered a regular theatre. Pepys chronicles, in 1668, a visit "to the King's Playhouse, to see an old play of Shirley's, called 'Hide Park,' the first day acted [revived], where horses are brought upon the stage." He expresses no surprise at the introduction of the animals, and this may not have been their first appearance on the scene. He is content to note that "Hide Park" is "a very moderate play, only an excellent epilogue spoken by Beck Marshall." The scene of the third and fourth acts of the comedy lies in the Park, and foot and horse races are represented. The horses probably were only required to cross the stage once or twice. A representation of Corneille's tragedy of "Andromeda," in 1682, occasioned great excitement in Paris, owing to the introduction of a "real horse" to play the part of Pegasus. The horse was generally regarded as a kind of Roscius of the brute creation, and achieved an extraordinary success. Adorned with wings and hoisted up by machinery, he neighed and tossed his head, pawed and pranced in mid-air after a very lively manner. It was a mystery then, but it is common enough knowledge now, that the horse's histrionic skill is founded upon his appetite. Kept without food for some time the horse becomes naturally moved at the sight of a sieve of corn in the side-wings. His feats, the picking up of gloves and handkerchiefs, even the pulling of triggers, originate but in his efforts to find oats. By-and-by his memory is exercised, and he is content to know that after the conclusion of his "business" he will be rewarded with oats behind the scenes. The postponement of his meals attends his failure to accomplish what is required of him. Of old, perhaps, some cruel use of whip and spur may have marked the education of the "trick-horse." But for a long time past the animal's fears have not been appealed to, but simply his love of food. Horses are very sagacious, and their natural timidity once appeased, they become exceedingly docile. An untrained horse has often shown himself equal to the ordinary requirements of the equestrian manager after only four days of tuition.