Goetia – S. L. MacGregor Mathers (1904) (quoted)
The Fiftieth Spirit is Furcas. He is a Knight, and appeareth in the Form of a Cruel Old Man with a long Beard and a hoary Head, riding upon a pale-coloured Horse, with a Sharp Weapon in his hand. His Office is to teach the Arts of Philosophy, Astrology, Rhetoric, Logic, Cheiromancy, and Pyromancy, in all their parts, and perfectly. He hath under his Power 20 Legions of Spirits. His Seal, or Mark, is thus made, etc.
Pseudomonarchia daemonum – Johann Wier (1583) (quoted)
Furcas is a knight and commeth foorth in the similitude of a cruell man, with a long beard and a hoarie head, he sitteth on a pale horsse, carrieng in his hand a sharpe weapon, he perfectlie teacheth practike philosophie, rhetorike, logike, astronomie, chiromancie, pyromancie, and their parts: there obeie him twentie legions.
Dictionnaire Infernal – Collin de Plancy (1863) (paraphrased)
Forcas/ Forras/ Furcas is a knight and high president of hell controlling 29 legions ofdemons. He appears as a man with a long beard and white hair, rides a horse, and carries a pointed dart. He teaches the virtues of herbs and precious stones, logic, esthetics, chiromancy, pyromancy, and rhetoric. He can make one invisible, ingenious, and articulate. He also can find lost things and discover treasures.