Gaius Julius Solinus [3rd century CE] (De mirabilibus mundi / Polyhistor, Chapter 30.20): At almost the same time [during Caesar's games in Rome], monsters called cephi were exhibited there. Their hind feet, from the ankle to sole, resembled human limbs, and their fore feet recalled men’s hands. But they were not seen by us more than once. - [Arwen Apps translation, 2011]

Thomas of Cantimpré [circa 1200-1272 CE] (Liber de natura rerum, Quadrupeds 4.21): Cefusa is a monster, as Solinus says, which was brought to Rome in the time of Caesar. Its legs and hind feet are like those in a human, while the fore feet are like the hands of men. This signifies the hypocrisy of those who, though they may appear to have a love of virtue and good works, are yet full of deceit within. - [Badke translation/paraphrase]