Note 1166 — Chapter IV
W. (William) Falconer translation
Pomponius Mela gives this city the name of Hexi, or Ex, according to another reading; Pliny names it Sexi, with the surname of Firmum Julium; and Ptolemy, Sex. This is merely a difference relative to the aspiration of the word, which was sometimes omitted, at other times expressed by the letters H or S indifferently.