This evening Mr. Casson will speak about Troy, which must be almost the most fascinating of ancient sites for the archæologist. Such was the importance of its strategic position in the ancient world that city was built upon the ruins of city as one after another was besieged and sacked. It is as well to remember that there were other Troys besides the Troy of the Iliad, though it would seem hard to be compelled to believe that Achilles and Hector died, not for Helen's face, but for the freedom of the Straits to corn-ships to and from the Black Sea.