Note 176 — THE THEOGONY.
George Chapman translation
Geryon rose.] One of the principal and most ancient settlements of the Amonians upon the ocean was at Gades; where a prince was supposed to have reigned, named Geryon. The harbour at Gades was a very fine one, and had several tor, or towers, to direct shipping: and as it was usual to imagine the deity to whom the temple was erected to have been the builder, this temple was said to have been built by Hercules. All this the Grecians took to themselves. They attributed the whole to Hercules of Thebes: and as he was supposed to conquer wherever he came, they made him subdue Geryon: and changing the tor or towers into so many head of cattle, they describe him as leading them off in triumph. Tor-keren signified a regal tower; and this being interpreted τρικαρηνος, this personage was in consequence described with three heads. Bryant.
Erythia, according to Pliny, is another name for Gades.