Strabo Geography 7.4.7

[7] In addition to the places in the Chersonesus which I have enumerated, there were also the three forts which were built by Scilurus and his sons—the forts which they used as bases of operations against the generals of Mithridates—I mean Palacium, Chabum, and Neapolis. ¹ There was also a Fort Eupatorium, ² founded by Diophantus when he was leading the army for Mithridates. There is a cape about fifteen stadia distant from the wall of the Chersonesites; ³ it forms a very large gulf which inclines towards the city. And above this gulf is situated a lagoon ⁴ which has salt-works. And here, too, was the Ctenus Harbor. Now it was in order that they might hold out that the besieged generals of the king fortified the place, established a garrison on the cape aforesaid, and filled up that part of the mouth of the gulf which extends as far as the city, so that there was now an easy journey on foot and, in a way, one city instead of two. Consequently, they could more easily beat off the Scythians. But when the Scythians made their attack, near Ctenus, on the fortified wall that extends across the isthmus, and daily filled up the trench with straw, the generals of the king set fire by night to the part thus bridged by day, and held out until they finally prevailed over them. And today everything is subject to whatever kings of the Bosporians the Romans choose to set up.