Strabo, Geography
H.C. Hamilton, Esq., W. Falconer, M.A., Ed.

To their simplicity and vehemence, the Gauls join much folly, arrogance, and love of ornament. They wear golden collars round their necks, and bracelets on their arms and wrists, and those who are of any dignity have garments dyed and worked with gold. This lightness of character makes them intolerable when they conquer, and throws them into consternation when worsted. In addition to their folly, they have a barbarous and absurd custom, common however with many nations of the north, of suspending the heads of their enemies from their horses' necks on their return from tattle, and when they have arrived nailing them as a spectacle to their gates. Posidonius says he witnessed this in many different places, and was at first shocked, but became familiar with it in time on account of its frequency. The beads of any illustrious persons they embalm with cedar, exhibit them to strangers, and would not sell them for their weight in gold.¹ However, the Romans put a stop to these customs, as well as to their modes of sacrifice and divination, which were quite opposite to those sanctioned by our laws. They would strike a man devoted as an offering in his back with a sword, and divine from his convulsive throes. Without the Druids they never sacrifice. It is said they have other modes of sacrificing their human victims; that they pierce some of them with arrows, and crucify others in their temples; and that they prepare a colossus of hay and wood, into which they put cattle, beasts of all kinds, and men, and then set fire to it.