In Thrinacie he is detained by Notus, blowing for a month, and by the total absence of any wind but Notus and Eurus. The common point of these winds is, that they are chiefly in the southern hemisphere. Also it would seem from this part of the Fourth Book that Boreas was evidently the wind that Ulysses required to help him forward on his way home, rather than Zephyrus: for it was the latter wind that caught them when they were already on their passage, and brought the hurricane in which the ship went to pieces (Od. xii. 408). Accordingly, as the Bosphorus is geographically fixed, I place Thrinacie beside it, and Scylla beside Thrinacie. It will be observed that, after allowance is made for too much northing in the north coast of the Propontis, the mouth of Scylla will be at the point, from which a N. N. E. wind would have brought Ulysses to the Dardanelles, and would thus have placed him, by the shortest cut, at the very gate of the Ægæan, and of the known route to his home. The Crimea has so much the character of an island, and its south-eastern face appears to be both in scenery and climate so delightful, while again its proximity to the Ocean-mouth of the Odyssey is so suitable, that we might be tempted to consider it as representing the abode of the Sirens. But it is too large for one of Homer’s νῆσοι. Probably, too, the isle of Sirens should lie on the direct route from Ææa to the Straits. IX. When out of sight of the island (403), the ship encounters a violent Ζέφυρος, and founders. Ulysses mounts on a couple of spars (424). In one night Notus drifts him upon the passage of Scylla and Charybdis, which he traverses in safety (427-30, 442-6), and then drifting on, apparently with the same wind, he reaches, on the tenth day, the island of Calypso, Ὠγυγίη νῆσος (xii. 447, 8; xxiii. 333), which is the ὄμφαλος or central point of the θάλασσα (Od. i. 50): that is to say which, as nearly due north from Greece, not only is conceived to be alike removed from the supposed eastern and western Ocean, but also if not equidistant, yet very distant, at all points from main land.