It was Poseidonius’ ethnography of the Celtsthat provided the information for Strabo, Diodorus Siculus,Athenaeus, and possibly also Caesar.

Diodorus’ description of the long droopingmoustaches of the Celts, so long that they completely cover themouth so that drink is strained through them.

Poseidonius is probably the source for the account published byDiodorus Siculus of Celtic wine-drinking.

The horn's loud, lugubrious tones "suited the tumult of war," wrote Diodorus Siculus around 50 B.C. Later Roman troops used the karnyx themselves.