Du Cange,[1147] misled by the fact that a Church of St. Acacius was found in the Tenth Region—one of the Regions on the northern side of the city—has classed the Neorion at the Heptascalon among the harbours on the Golden Horn. But to identify a site in Byzantine Constantinople by means of a church alone is a precarious proceeding, for churches of the same dedication were to be found in different quarters of the city. This, Du Cange[1148] himself admits, was possible in the case before us; since, besides the Church of St. Acacius at the Heptascalon, writers speak of a Church of St. Acacius ad Caream (Ἐν τῇ Καρύᾳ), and the identity of the two sanctuaries cannot be assumed. But the existence of a second church dedicated to St. Acacius is not a mere possibility. According to Antony of Novgorod,[1149] there was a church of that dedication also on the southern side of the city, not far from the Church of SS. Sergius and Bacchus. The Neorion at the Heptascalon may, therefore, have been on the Sea of Marmora. And that it was there, as a matter of fact, is evident from the statements made regarding that harbour by Cantacuzene and Nicephorus Gregoras, in their account of the naval engagement fought in the Bosporus in 1351, between a Genoese fleet on the one hand, and the Greeks, supported by Venetian and Spanish ships, on the other. Upon coming up from the Ægean to take part in the war, the Venetians and the Spaniards, says the former historian,[1150] anchored off the Prince’s Island, to rest their crews after the hardships of the winter. There they remained three days. Then, quitting their moorings, the two allies made for the Neorion at the Heptascalon, or, as it is also styled, the Neorion of the Byzantines (τὸ Βυζαντίων νεώριον),[1151] to join the Imperial fleet which was stationed there, all ready for action, and awaiting their arrival. Meanwhile, the Genoese admiral, with seventy ships, had taken up his position at Chalcedon (Kadikeui), to watch and oppose the movements of the allied squadrons. The wind was blowing a gale from the south, and though the Venetians and Spaniards had started for the Heptascalon very early in the morning, it was with the utmost difficulty, and late in the afternoon, that they succeeded in crossing from the island to the city. Even at the last moment they narrowly escaped destruction, by being dashed to pieces against the boulders scattered along the foot of the walls as a breakwater.