The ancient writers who have treated of the Unicorn are too numerous for us to specify. Some of the moderns may be referred to. Garcias describes this marvellous creature from one who alleges that he had seen it. The seer affirmed that it was endowed with a wonderful horn, which it would sometimes turn to the left and right, at others raise, and then again depress. Ludovicus Vartomanus writes, that he saw two sent to the Sultan from Ethiopia, and kept in a repository at Mahomet's tomb in Mecca. Cardan describes the Unicorn as a rare animal, the size of a horse, with hair very like that of a weasel, with the head of a deer, on which one horn grows three cubits in length (a story seldom loses anything in its progress) from the forehead, ample at its lowest part, and tapering to a point; with a short neck, a very thin mane, leaning to one side only, and less on the ear, as those of a young roe.

In Jonston's "Historia Naturalis," 1657, we see the smooth-horned solipede, "Wald Esel;" and the digitated and clawed smooth-horned "Meer Wolff," the latter with his single horn erect in the foreground, but with it depressed in the background, where he is represented regaling on serpents. Then there are varieties, with the head, mane, and tail of a horse; another smooth-horned, with a horse's head and mane, a pig's-tail and camel-like feet; the "Meer Stenbock, Capricornus Marinus," with hind webbed feet, and a kind of graduated horn, like an opera-glass pulled out, in the foreground, and charging the fish most valiantly in the water in the distance. Then there is another, with a mule's head and two rhinoceros-like horns, one on his forehead and the other on his nose; and a horse's tail, with a collar round his neck; a neck entirely shaggy—and a twisted horn, a shaggy gorget, and curly tail, are among other peculiarities.

The Unicorn seems to have been a sad trouble to the hunters, who hardly knew how to come at so valuable a piece of game. Some described the horn as moveable at the will of the animal—a kind of small sword, in short, with which no hunter who was not exceedingly cunning in fence could have a chance. Others told the poor foresters that all the strength lay in its horn, and that when pressed by them it would throw itself from the pinnacle of the highest rock, horn foremost, so as to pitch upon it, and then quietly march off not a bit the worse!

Modern zoologists, disgusted as they well may be with fables, such as we have glanced at, disbelieve, generally, the existence of the Unicorn, such, at least, as we have referred to; but there is still an opinion that some land animal bearing a horn on the anterior part of its head, exists besides the rhinoceros. The nearest approach to a horn in the middle of the forehead of any terrestrial mammiferous animal known to us is the bony protuberance on the forehead of the giraffe; and though it would be presumptuous to deny the existence of a one-horned quadruped other than the rhinoceros, it may be safely stated that the insertion of a long and solid horn in the living forehead of a horse-like or deer-like cranium is as near an impossibility as anything can be.

Rupell, after a long sojourn in the north-east of Africa, stated that in Kordofan the Unicorn exists; stated to be the size of a small horse, of the slender make of the gazelle, and furnished with a long straight horn in the male, which was wanting in the female. According to the statements made by various persons, it inhabits the deserts to the south of Koretofan, is uncommonly fleet, and comes only occasionally to the Koldagi Heive mountains on the borders of Kordofan.

Other writers refer the Unicorn to the antelope. The origin of the name of antelope is traced by Cuvier to the Greek Anthalops, applied to a fabulous animal living on the banks of the Euphrates, with long jagged horns, with which it sawed down trees of considerable thickness! Others conjecture this animal to have been the Oryx, a species of antelope, which is fabulously reported to have had only one horn, and to have been termed Panthalops in the old language of Egypt.

In his "Revolutions on the Surface of the Globe." Cuvier refers the idea of the Unicorn to the coarse figures traced by savages on rocks. Ignorant of perspective, and wishing to present in profile the horned antelope, they could only give it one horn; and thus originated the Oryx. The oryx of the Egyptian monuments is, most probably, but the production of a similarly crude style, which the religion of the country imposed on the artist. Many of the profiles of quadrupeds have only one leg before and one behind: why, then, should they show two horns? It is possible that individual animals might be taken in the chase whom accident had despoiled of one horn, as it often happens to chamois and the Scythian antelope; and that would suffice to confirm the error which these pictures originally produced. It is thus, probably, that we find anew the Unicorn in the mountains of Thibet.

The Chiru Antelope is the supposed Unicorn of the Bhotians. In form it approaches the deer; the horns are exceedingly long, are placed very forward in the head, and may be popularly described as erect and straight. It is usually found in herds, and is extremely wild, and unapproachable by man. It is much addicted to salt in summer, when vast herds are often seen at the rock-salt beds which abound in Tibet. They are said to advance under the conduct of a leader, and to post sentinels around the beds before they attempt to feed.

Major Salter is stated to have obtained information of the existence of an animal in Tibet closely resembling the Unicorn of the ancients, which revived the belief of naturalists by adducing testimonies from Oriental writings. Upon this statement, M. Klaproth remarks, that previous to Major Salter's Reports, the Catholic missionaries, who returned to Europe from China by way of Tibet and Nepal, in the seventeenth century, mentioned that the Unicorn was found in that part of the Great Desert which bounds China to the west, where they crossed the great wall; that Captain Turner, when travelling in Tibet, was informed by the Raja of Boutan that he had one of these animals alive; and that Bell, in his "Travels to Peking," describes a Unicorn which was found on the southern front of Siberia. He adds:—"The great 'Tibetan-Mongol Dictionary' mentions the Unicorn; and the 'Geographical Dictionary of Tibet and Central Asia,' printed at Peking, where it describes a district in the province of Kham, in Tibet, named Sera-zeong, explains this name by 'the River of Unicorns,' because," adds the author, "many of these animals are found there."

In the "History of the Mongol-Khans," published and translated at St. Petersburg, we find the following statement:—Genghiz Khan, having subjected all Tibet in 1206, commenced his march for Hindustan. As he ascended Mount Jadanarung, he beheld a beast approaching him of the deer kind, of the species called Seron, which have a single horn at the top of the head. It fell on its knees thrice before the monarch, as if to pay respect to him. Every one was astonished at this incident. The monarch exclaimed. "The Empire of Hindustan is, we are assured, the country where are born the majestic Buddhas and Bodhisatwas, as well as the potent Bogdas and princes of antiquity: what can be the meaning, then, of this animal, incapable of speech, saluting me like a man?" Upon this, he returned to his own country. "This story," continues M. Klaproth, "is also related by Mahommedan authors who have written the life of Genghiz. Something of the kind must, therefore, have taken place. Possibly, some of the Mongol conqueror's suite may have taken a Unicorn, which Genghiz thus employed, to gain a pretext for abstaining from an expedition which promised no success."