(25) At a distance of 300 stadia beyond +Mouza+ we reach the straits where the shores of Arabia and Africa advance so near to each other that the passage between them has only, according to the _Periplûs_, a width of 60 stadia, or 7½ miles. In the midst of the passage lies the island of +Diodôros+ (now Perim), which is about 4½ miles long by 2 broad, and rises 230 feet above the level of the sea. The straits, according to Moresby, are 14½ geographical miles wide at the entrance between Bab-el-Mandab Cape (near which is Perim) and the opposite point or volcanic peak called +Jibel Sijan+. The larger of the two entrances is 11 miles wide, and the other only 1½. Strabo, Agathêmeros, and Pliny all agree with the _Periplûs_ in giving 60 stadia as the breadth of the straits. The first passage of those dreaded straits was regarded as a great achievement, and was naturally ascribed to Sesostris as the voyage though the straits of Kalpê was ascribed to Heraklês. Situated on the shores of the straits was a place called +Okêlis+. This was not a mart of commerce, but merely a bay with good anchorage and well supplied with water. It is identical with the modern Ghalla or Cella, which has a bay immediately within the straits. Strabo following Artemidoros notes here a promontory called +Akila+. Pliny (VI. xxxii. 157) mentions an emporium of the same name “ex quo in Indiam navigatur.” In xxvi., 104 of the same Book he says: “Indos petentibus utilissimum est ab +Oceli+ egredi.” Ptolemy mentions a +Pseudokêlis+, which he places at the distance of half a degree from the emporium of +Okêlis+. 26. Beyond +Okêlis+, the sea again widening out towards the east, and gradually expanding into the open main, there lies, at about the distance of 1,200 stadia, +Eudaimôn Arabia+, a maritime village subject to that kingdom of which Kharibaêl is sovereign—a place with good anchorage, and supplied with sweeter and better water than that of Okêlis, and standing at the entrance of a bay where the land begins to retire inwards. It was called Eudaimôn (‘rich and prosperous’), because in bygone days, when the merchants from India did not proceed to Egypt, and those from Egypt did not venture to cross over to the marts further east, but both came only as far as this city, it formed the common centre of their commerce, as Alexandria receives the wares which pass to and fro between Egypt and the ports of the Mediterranean. Now, however, it lies in ruins, the Emperor having destroyed it not long before our own times.