Thomas of Cantimpré [circa 1200-1272 CE] (Liber de natura rerum, Serpents 8.7): Cornuti [horned], as Solinus says, are so called because they have horns with which they attack those who approach them. They have, besides this, a noxious poison, by which they kill the people who are struck, unless tyriaca [theriac, an ancient antidote for poison] helps them. We read that the Holy Fathers, in Egypt, killed these serpents. - [Badke translation/paraphrase]