The Marmora narrowed, we passed Gallipoli on the European side, where the English and French hostages had had their curious adventure the week before, and on into the Dardanelles proper and the zone of war. It was some forty miles down this salt-water river (four miles wide at its widest, and between the forts of Chanak Kale and Kilid Bahr, near its lower end, a fraction over a mile) from the Marmora gateway to the Aegean. On the left were Lapsaki and the green hills of Asia, cultivated to their very tops; on the right Europe and the brown hills of the peninsula, now filled with guns and horses and men. Over there, up that narrow strip of Europe, running down between the Dardanelles and the Aegean, the Allies had been trying for weeks to force their way to Constantinople. They had begun in February, you will recall, when they bombarded the forts at the outer entrance to the Dardanelles--Sedd ul Bahron the European side, at the tip of the peninsula, and Kum Kale, across the bay on the Asiatic shore.. These forts occupy somewhat the relation to Constantinople that Sandy Hook does to New York, although much farther away--they face, that is to say, the open sea, and the guns of the fleet, heavier than those of the old forts, could stand off at a safe distance and demolish them. When the ships pushed on up the strait toward Kilid Bahr and Chanak Kale--somewhat like trying to run the Narrows at New York--there was a different story. They were now within range of shore batteries and there were anchored mines and mines sent down on the tide. On March 18 the Irresistible, Ocean, and Bouvet were sunk, and it began to be apparent that the Dardanelles could not be forced without the help of a powerful land force. So in April landing parties were sent ashore: at Kum Kale and Sedd ul Bahr, at Kaba Tepe and Art Burnu, some twelve or fourteen miles farther north on the Aegean side of the peninsula, and at another point a few miles farther up. At Sedd ul Bahr and along the beach between Kaba Tepe and Art Bumu the Allies made their landing good, dug themselves in, and, reinforced by the fire of the ships, began a trench warfare not unlike that which has dragged on in the west. The peninsula is but ten or twelve miles wide at its widest, and the Dardanelles side is within range of the fleet's great guns, firing clear overland from the Aegean. It was by this indirect fire that Maidos was destroyed and Gallipoli partly smashed and emptied of its people. There were places toward the end of the peninsula where Turkish infantrymen had to huddle in their trenches under fire of this sort coming from three directions. Whenever the invaders had it behind they were naturally at an advantage; whenever it ceased they were likely to be driven back. The Turks, on the other hand, had the advantage of numbers, of fighting on an "inside line," and of a country, one hill rising behind another, on the defense of which depended their existence as a nation in Europe.