and the breadth, where it is broadest, three thousand three hundred: and of this great Sea the mouth is but four furlongs broad, and the length of the mouth, that is of the neck of water which is called Bosphorus, where, as I said, the bridge of ships had been made, is not less than a hundred and twenty furlongs. This Bosphorus extends to the Propontis; and the Propontis, being in breadth five hundred furlongs and in length one thousand four hundred, has its outlet into the Hellespont, which is but seven furlongs broad at the narrowest place, though it is four hundred furlongs in length: and the Hellespont runs out into that expanse of sea which is called the Aegean. 86. These measurements I have made as follows:⁠—a ship completes on an average in a long day a distance of seventy thousand fathoms, and in a night sixty thousand. Now we know that to the river Phasis from the mouth of the Sea (for it is here that the Pontus is longest) is a voyage of nine days and eight nights, which amounts to one hundred and eleven myriads 629