Aldrovandus, Amatus Lusitanus, Boerhaave, Dupre, Schenck, Riverius, Vallisneri, and many others mention horns on the head.

In the ancient times horns were symbolic of wisdom and power.

Michael Angelo in his famous sculpture of Moses has given the patriarch a pair of horns.

Rhodius observed a Benedictine monk who had a pair of horns and who was addicted to rumination.

Fabricius saw a man with horns on his head, whose son ruminated; the son considered that by virtue of his ruminating characteristics his father had transmitted to him the peculiar anomaly of the family.