Beast

Sources : Monocerus

Pliny the Elder [1st century CE] (Natural History, Book 8, 31): Pliny does not distinguish between the monocerus and the unicorn.

Gaius Julius Solinus [3rd century CE] (De mirabilibus mundi / Polyhistor, Chapter 52.39): [Chapter 52.39] But the cruelest of all is the monoceros, a monster which roars horridly, has the body of a horse, the feet of an elephant, the tail of a pig, and the head of a deer. [Chapter 52.40] A horn of wonderful luster sticks out of its forehead, to a length of four feet. It is so sharp that whatever it attacks is easily pierced by its blows. It does not come alive into the power of men. It may, indeed, be killed, but not captured. - [Arwen Apps translation, 2011]

Aberdeen Bestiary [circa 1200 CE] (folio 15r):The monoceros is a monster with a horrible bellow, the body of a horse, the feet of an elephant and a tail very like that of a deer. A magnificent, marvelous horn projects from the middle of its forehead, four feet in length, so sharp that whatever it strikes is easily pierced with the blow. No living monoceros has ever come into man's hands, and while it can be killed, it cannot be captured.

Thomas of Cantimpré [circa 1230-1245 CE] (Liber de natura rerum, Quadrupeds 4.69): The single-horns [monocerus], as Solinus and Pliny said, are monsters with a horrid bellowing voice, the body of a horse, the feet of an elephant, the tail of a pig, and the head of a deer. A horn marvelous in its splendor with a length of four feet, stretches out from the middle of its forehead, so sharp, that whatever it might attack would be pierced easily by its blow. Having been captured it is able to be killed, but never tamed. Yet Jacobus says, that it never comes alive into the power of man, and indeed it is able to be killed, but not seized, because discerning that he has been captured, he casts off his own life with rage. - [Translation from The Thomas Project]