What Phrantzes means by the “entrance of the harbour” (τὴν εἴσοδον τοῦ λιμένος) admits of no dispute, for the phrase has only one signification. But, as though to render mistake impossible, he repeats the expression, in that sense, several times. The Greek ships, which were moored beside the chain across the mouth of the harbour, and which the Sultan endeavoured to sink or drive away by the fire of a battery planted on the hill of St. Theodore, to the north-east of Galata, Phrantzes[844] observes, were stationed “at the entrance of the harbour” (ἐν τῇ εἰσόδῳ τοῦ λιμένος). The object of this bombardment, adds the historian[845] in the next sentence, was not simply to force “the entrance to the harbour” (διὰ τὴν εἴσοδον τοῦ λιμένος), but also to injure the Genoese shipping at that point, and thus show that the Sultan dared to act in any way he pleased, even towards the Italians of Galata. Again, Phrantzes[846] remarks that the ships moored along the chain at the mouth of the harbour (ἐν τῶ στόματι τοῦ λιμένος) were placed here to render entrance into the harbour more difficult to the enemy (ὅπως ἰσχυροτέρως κωλύσωσι τὴν εἴσοδον). Equally decisive is the indication given regarding the tower which stood opposite the Imperial Gate. It was “in the middle of the current.” This statement carries the mind, at first, to the tower which stood on the rock off Scutari (Damalis, Arcla), where the lighthouse Kiz Kalehssi has been erected. But the idea that Phrantzes had that tower in view cannot be entertained for more than a moment; for to have stationed Gabriel there, with the Turkish fleet in complete command of the Bosporus and the Sea of Marmora, was not simply useless, but impossible. The current intended can be none other than the strong current at the head of the Seraglio Point, where it divides in two swift streams, which Nicephorus Gregoras[847] compares to Scylla and Charybdis, one running up the Golden Horn, the other out into the Sea of Marmora. A tower near a point with rushing waters on either hand might aptly be described as “in the middle of the current.”[848] Furthermore, Phrantzes[849] mentions the tower referred to, in close connection with what stood, unquestionably, near the head of the promontory. He speaks of it immediately after the Horaia Pylè, and immediately before the ships which defended the chain across the harbour’s mouth, as though in the same vicinity. In the second place, the view that the Imperial Gate was near the Seraglio Point is supported by the testimony of Leonard of Scio, when he makes the statement that Gabriel of Treviso fought bravely, with his men, on the portion of the walls extending from the Beacon-tower as far as the Imperial Gate, at the entrance of the bay (of the Golden Horn): “Gabriel Trevsianus cordatissime a Turri Phani usque ad Imperialem Portam, ante sinum, decertabat.”[850] The archbishop’s phrase “ante sinum” corresponds to Phrantzes’ ἐν τῇ εἰσόδῳ τοῦ λιμένος.