Pseudo-Scylax, Periplus of Pseudo-Scylax
“ A direct voyage from the Istros to Ram's Forehead is three days and three nights' sail, but a voyage along the coast takes twice this time, because it is a bay. In this bay there is an island, an uninhabited island, called White, sacred to Achilles. [224] From Ram's Forehead, the voyage to Pantikapaion is a day and a night's sail. From Pantikapaion to the mouth of Lake Maiotis is 20 stadia. Lake Maiotis is said to be the halfway point [as one sails around] Pontos. ”

