Aelianus [170-230 CE] (On the Characteristics of Animals, Book 2, 16): ...the animal known as tarandus transforms itself hair and all, and can adopt such an infinite variety of colors as to bewilder the eye. It is a native of Scythia and in its hide and its size resembles a bull; and the Scythians cover their shields with its hide and consider it a good counter to a spear. - [Scholfield translation]

Gaius Julius Solinus [3rd century CE] (De mirabilibus mundi / Polyhistor, Chapter 19.18): Those they call “goat-stags” [tragelaphos] are almost the same in appearance [as deer], only they have shaggy flanks and woolly chins with hanging beards. They are not to be seen anywhere except around the Phasis. - [Arwen Apps translation, 2011]

Isidore of Seville [7th century CE] (Etymologies, Book 12, 1:20): Tragelaphi were named by the Greeks; while they have the same appearance as deer, nevertheless they have shaggy flanks like he-goats, and hairy chins with long beards. They are found nowhere except around the river Phasis. - [Barney, Lewis, et. al. translation]

Thomas of Cantimpré [circa 1200-1272 CE] (Liber de natura rerum, Quadrupeds 4.101): Tragelaphus is an animal forbidden by [Jewish] law. As Isidore says, it has the appearance of a deer in many ways: it has hairy legs like a goat and a chin with a bushy beard. Its head is studded with branched horns, and it is powerful in its strength and in its weapons, able to repel all adversaries, and to keep itself safe from its enemies. They live around a certain land called Fassida, and are nowhere else to be found. - [Badke translation/paraphrase]

Bartholomaeus Anglicus [13th century CE] (Liber de proprietatibus rerum, Book18.100): Tragelaphus is called Hircocervus also, & hath that name Tragelaphus of Tragos, yt is a goat bucke, & Elephos, that is an hart, as Isid[ore] saith, lib. 12. And be called Tragelaphi among ye Gréeks: and some be of the kind of an Hart, and have rough eares as Goat buckes, and rough chins with beards. Aristotle li. 2. speaketh of them and sayth, that some wild beasts have crooked hornes, as Hircoceruus, yt is called Tragelaphus also, & hath soles in the féet: & his body waxeth to the quantity of an hart: and this beast beareth downeward his face, and hath hornes lyke unto an Hart Calfe. - [Batman]