What the Carthaginians would refer to as the frozen crystals of death formed thick sheaths over the roofs that ended with jagged stalactites of ice hanging on the eves, and it blanketed the alleyways at least as deep as a man’s forearm ran long. Only the tireless shoveling of Gallic servants, the one group of barbarians in Carthaginian employment who could tolerate the low temperature best, created streaks in t...